Fully welded 1/4" rim support and high-tensile-strength 5/8" steel rim offers years of trouble-free dunking. The low maintenance AcuFlex adjustable breakaway mechanism allows fine tuning of rim resistance and smooth action. Complies with NCAA standards for rim elasticity and ball rebound. Concealed net attachment system helps prevent hand injuries. Fits all makes and models of 42" and 48" tall glass backboards. Includes mounting hardware and Anti-Whip net. Covered by a four-year limited warranty.