For use with 10" [254mm] diameter hole. Cover and stem are pre-assembled together. All devices are recessed 4 1/2" [114mm} below the finished floor level. Unit ships complete with an all aluminum cover (assembled) designed to sit on top of finished floor surface (carpet, tile, wood, concrete or terrazzo). Covers are available in the following powder coated finishes: black (BK), gray (GY), nickel (NK), brass (BS) and aluminum (AL). The covers are also available in two plated finishes: brass (PB)