The Hef-T-Bracket™ 230-B2L is a large size wall bracket used for supporting ductless condensers. Hef-T-Bracket features a cross bar that is attached to the wall, and two L-shaped brackets that are hooked and bolted into place on the cross bar. The arms/shelf is 21" long to support larger condensers. Diversitech Hef-T-Bracket™ Large Mounting Bracket, Type 2, 21 in Length, For Use With: Mini Split Condenser, Wall Mount, Import