Gibraltar's 40 curved side extension. - Add any style to the Basic Rack for more mounting space. - Side extensions have the same length mounting bar as Basic Racks. - One side mounts to either side of a Basic Rack; the other side is supported with a vertical T-Leg base. - This extension provides room to mount a myriad of drums, cymbals, and accessories. - These racks are unquestionably the touring professionals choice. - As the 1 selling rack system worldwide, theyre also the consumers choice.