Wilson 72" Stadium Glass In Ground Basketball System Includes Pole, Backboard, Arm Support, and Flex Rim 72" x 42" fused tempered glass with clear shot backboard design. Premium Pro Flex 5/8" thick steel rim Power glide system adjusts rim from 7'6" to 10' 6" square steel 3/16" thick pole with 8 welded gussets All pivot points utilize welded steel encasements