Built-in support structure absorbs over 98% of the stress from goal contact without transferring it to the glass… Goal is mounted "off glass" so even excessive hanging and abuse will not cause stress • Never again be concerned about the risk of injury or inconvenience of glass breakage • We are so confident of our "XL" design durability that for over five years we have offered a $250 installation reimbursement in addition to our unconditional replacement warranty without a single request for reimbursement • Every "XL" unbreakable backboard features a polished aluminum extrusion framework  glass cushioning gasket  high strength steel support structure  ½" tempered glass with fire impregnated bright white border and shooters square and unconditional lifetime warranty • All Bison competition glass backboards are pre-drilled for quick installation of original DuraSkin backboard padding.  This board is intended primarily for replacement of broken  existing 48" boards  mounted on fan style  wall or ceiling structures (35" x 20") common in older gyms… If you are replacing fan steel or glass backboards on both ends of a court  Bison recommends use of BA42XLC short backboards • Consult a Bison Product Specialist for selection of the right board for your application • Formerly BA48C • Unconditional lifetime warranty. Approx. shipping weight: 240#; Truck  Caution: Studies have demonstrated that 42" x 72" glass backboards reduce the risk of player injury from backboard contact. BA42XL and BA42XLC are recommended for all new installations and fan-to-rectangle conversions. Bison makes 48" x 72" backboards available ONLY for replacement applications.