Designed for use with all concrete rings. Used to close concrete ring before installation. It measures 4-1/2 in. across and features three 1/2 in. and two 3/4 in. knockouts.
- Waxed fixture ears prevent concrete from interfering with the threads
- Ears on inside of box are for fixtures
- External ears are used to nail the ring to the wood form
- Single row of 1/2 in. and 3/4 in. knockouts
- Support a light fixture up to 50 pounds
- Flat sides provide excellent contact for locknuts