48" POLYCARBON BOARD, SLAM JAM RIM - 791655Free Delivery. The Polycarbonate Combo fills that empty space on your garage wall with hours of play, competition, and personal achievement. Shoot for the sky and play the game. The Spalding 79354 basketball backboard and rim combo gives you a Pro look with a clear, Poly Carbonate backboard. Its set up with a Slam Jam breakaway rim for tough performance and comes with an all weather net and a backboard pad. Model #: 421 253 48 x 32 steel framed