For new or retrofit installations. This Shower Seat is a heavy duty stay-in-place molded plastic form that is easily installed, and can be tiled the same day. It is a standard 30” wide, and has guide marks on the top surface to make it easy to trim the seat to 24” wide. The front face has a 3/16” wide tile support ledge for easier tile alignment and full tile support. Two level vials are supplied to indicate the proper minimum water drainage slope of 1/4” per 12” run. Capacity is 400 lbs. Screws, anchors and shims (to adjust for out of square walls, if necessary) and illustrated installation instructions are included. Weighs 71/2 lbs. For retrofit installations, the seat is installed over the tile and secured with the screws into six plastic toggle anchors. For new installations, the seat is installed over the wall boards and secured into blocking between the studs using six 21/4” long screws.