Stair Brackets: Made of virtually indestructible high-density urethane our stair brackets are cast from steel molds guaranteeing the highest quality on the market. High-precision steel molds provide a higher quality pattern consistency, design clarity & overall strength & durability. Lightweight they are easily installed with no special skills. Unlike plaster or wood urethane is resistant to cracking, warping or peeling. Factory-primed our stair brackets are ready for finishing. Select the side to order heading upstairs. Bracket size is 8" x 11 1/2". (right)