Rob, This is classified as Premium grade lumber.
Hi David, it looks like this WeatherShield 5/4 in. x 6 in. x 8 ft. Premium Above Ground Pressure-Treated Pine Decking Board is a store exclusive item and only able to be bought in a Home Depot store. Unfortunately we do not sell it with online stock for purchase. If you are unable to see the store inventory or price it is most likely either not a stocked item in your area or no longer available for purchase from Homedepot.com. I would advise you visit or contact your local Home Depot store for pricing and availability. Please follow the steps below to localize your Homedepot.com: 1. Localize Homedepot.com using your zip code (My Store Location: Change) 2. Choose the store where you want to pick up the item (Make this my Store) We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot!
This lumber is treated with Micronized Copper Azole (MCA), which is a micronized preservative-containing copper and biocides. During the pressure-treating process, those particles are suspended — rather than dissolved — in a wood preservative solution. The micronized copper eliminates the need for a solvent, which is required for other treatment methods. The preservative penetrates the wood's cellular structure, giving the lumber long-lasting resistance to decay and termites.