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Internet # 100404072

Model # B618RR

Store SKU # 339172

Store SO SKU #1001063737

1-Gang 18 cu. in. Electrical PVC Round Old Work Electrical Box (B618RR)

$3.72
  • Works with non-metallic sheathed cable
  • Made of rust-resistant thermoplastic for durability
  • Features cable clamps that hold the wires firmly
  • View More Details

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Product Details

About This Product

The Carlon 1-Gang 18 cu. in. round old work ceiling box is designed for use with non-metallic sheathed cable in accordance with Article 314 of the NEC. Great for residential and light commercial applications, the box is made of Polycarbonate, is listed for use with dry wall or sheet rock. The box is fire rated and UL listed for safety.

Highlights

Product Information

Internet # 100404072

Model # B618RR

Store SKU # 339172

Store SO SKU #1001063737

Specifications

Dimensions

Product Depth (in.)

2.6 in

Product Height (in)

4.25

Product Width (in.)

4.25 in

Details

Application

Wall

Box Type

Light Fixture

Indoor/Outdoor

Indoor

Material

Polycarbonate

Metallic/Non-Metallic

Non-Metallic

Number of Knockouts/Holes

0

Pack Size

1

Returnable

90-Day

Shape

Round

Work Type

Old Work

Warranty / Certifications

Certifications and Listings

UL Listed

Manufacturer Warranty

Yes

Questions & Answers

How much weight does this product hold?
ByMar 16, 2026
0 Answer | 
Answer This Question

How much weight can this box hold
ByMar 9, 2026
1 Answer | 
Answer This Question

Fixture up to 50lbs.

By|Mar 16, 2026


    What diameter hole is required
    ByMar 8, 2026
    1 Answer | 
    Answer This Question

    4-inch diameter hole for installation

    By|Mar 16, 2026


      What’s the weight rating?
      ByFeb 10, 2026
      0 Answer | 
      Answer This Question

      Hole size
      ByFeb 4, 2026
      2 Answers | 
      Answer This Question

      It should be sold with a template. The template is a 4 inch hole, with 3ea 1/2 inch holes in a triangle pattern around the edges, these are for the screw areas to fit. I marked and drilled the center and 3 edge holes, then used a 4 inch hole saw.

      By|Feb 11, 2026

        I used a coaster for drinks fits perfect.

        By|Feb 25, 2026


          Is this considered a 4 inch old work box
          ByDec 20, 2025
          0 Answer | 
          Answer This Question

          How many in a case
          ByDec 18, 2025
          1 Answer | 
          Answer This Question

          These are sold by the each but arrive in cases of 75 at store level.

          By|Mar 16, 2026


            Where am I connecting my ground wire please?
            ByOct 3, 2025
            1 Answer | 
            Answer This Question

            To the supply wire ground. Box is plastic, doesn't need to be bonded/grounded.

            By|Oct 10, 2025


              Viewing 1-8 of 123

              Customer Reviews

              4.6 out of 5

              • 4.6 out of 575 reviews
              • 73% recommend this product
              Filter by:
              Showing 1-10 of 575 reviews
              These old work electrical boxes worked perfect for installing PVC canless lights. No more searching for lathing or rafters to mount boxes. Just need a hole saw and a screwdriver. Very simple to install and use. Product seems to be very sturdy.
              by
              Item is perfect for my application. Very easy to install and provided a solid mount for ceiling light fixture. I thought it was reasonably priced and plan on purchasing again for next project.
              by
              • Verified Purchase
              This worked out just great for adding a lamp to my workshop desk area. The size fit into the wall just right without trouble. I made a simple template from the box circle and just scribed it a little smaller to fit the rim. It keeps the connections isolated and holds the lamp steady with the built in clamps that screw tight.
              by
              • Verified Purchase
              Will Fail
              It’s incredibly poor quality and will practically disintegrate over time. Do not waste time and money buying from this company, as you will have to replace it far earlier than you anticipate.
              by
                3 found this review helpful
                Works great!
                Works great!
                by
                • DIY
                4 found this review helpful
                Works great: 2 recommendations
                Worked great for sconces. I have 2 recommendations to users: #1 don't drill the 3x 1/2" holes 120 degrees apart, as the template describes. I did this for the first light and the 1/2" holes were very close to being visible around the base of my sconce. For the next 3 I cut the 4" hole with a hole saw, only, and didn't cut the 3x 1/2" holes. The old work box fit just fine (it was snug, but I actually preferred this). Recommendation #2: Tighten and loosen the 'ear-screws' once PRIOR to installation. Reason - the threads in the plastic ears are not pre-cut. I had issues with the ears/screws becoming cocked in a strange position behind the wall and would not tighten. This was because the screws were trying to cut the threads for the first time. If you pre tighten the screws (and then loosen them to the original position) before installation, it will make tightening and installing once in place very easy. I can tell you from experience that it is very frustrating having to remove the box from the wall because 1 ear became snagged/cocked and won't tighten. Once I learned from the first box and corrected the issues, the last 3 boxes were a breeze!
                by
                • DIY
                • Recommended
                165 found this review helpful
                Great to add light weight lighting to existing structure!
                I purchased three of these to hang some light weight simple pendant lights above our dining table. These are made for old construction. These normally come with a paper template shoved inside the box but this time there were none so I went on Carlon website and downloaded the template. I know I could get by without but I like the fact the template has points where you drill a 1/2" hole in 3 areas prior to cutting to compensate the extra space needed for the wings. It also ensures you don't end up with a larger hole than needed. After hole is cut you slide it up in place and with a philips screwdriver to tighten all 3 screws so the wings tighten to your substrate.
                by
                • Pro
                • Recommended
                39 found this review helpful
                This customer chose to rate the product and not provide text.
                by
                • Verified Purchase
                This is a Great electrical box we used for wiring a vanity light fixture in a bathroom. It works very well well in holding medium weight fixture without having to open additional Sheetrock for bracing .
                by
                • Verified Purchase
                Great fo using in wall mount light fixtures. Not so great on ceilings. Very easy to use. Just a great product overall when you don’t have any studs nearby
                by
                • Verified Purchase
                Showing 1-10 of 575 reviews

                Compare Key Features

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                Product Snapshot

                Ideal for homeowners looking for fire-rated electrical boxes, ensuring safety for residential wiring projects.
                Ideal for old-work applications, this round wall box features a durable PVC construction and easy-to-use knockouts, ensuring secure and efficient installation.
                Ideal for old work applications, this fire-rated box ensures safety and durability with its non-conductive PVC construction.
                Ideal for homeowners looking for a reliable ceiling fan box, making installation easier with its 35 lbs. weight capacity and compatibility with armored metal-clad cables.

                Capacity

                18 cu. in
                14 cu. in.
                20 cu. in.
                6 cu. in.

                Dimensions

                H 4.25 in, W 4.25 in, D 2.6 in
                H: 3.2 in., W: 3.25 in., D: 1.75 in.
                H 4.3 in. x W 2.3 in. x D 3.6 in.
                H 0.5 in, D 4 in, W 4 in

                Fire Resistance

                Weatherproof

                Number of Gangs

                1-Gang
                1