Pentair American Backup Ring (Standard Hole Pattern), 634595
No.6 Image 634595 Pentair Aquatic Systems American Products Back-Up Ring (Standard Hole Pattern). Used on American Products Amerlite Vinyl Niche Pool Lights. 12-5/8in outer diameter, chrome plated brass. This is the ring that goes on the outside or back-side of the pool wall, to secure the niche to a vinyl or fiberglass pool wall. More Pentair Aquatic American Products pool light parts can be found in our parts department.