An 18-inch inner diameter is the standard every full-size ball is made for, and this replacement rim matches it exactly so a tired backboard can be brought back into service instead of retired. The steel tube is acid-pickled, phosphated and powder-coated before assembly, a finish sequence aimed at rust rather than looks. Overall the goal measures 23 by 19 by 4 inches with a 19-inch outer ring, and it weighs 3 pounds, light enough to hold in place with one hand while the bolts go in. The included net is weather-resistant and hangs from formed hooks that keep it from slipping loose mid-game. Mounting hardware in the box covers walls, doors and existing backboards, indoors or out. Because no backboard ships with it, this is a repair part for a setup that already exists rather than a complete first install. Color: Black; Material: metal and polyester; Overall Dimensions: 23 in W x 19 in D x 4 in H; Inner Rim Diameter: 18 in; Outer Rim Diameter: 19 in; Net Weight: 3 lbs; Package Includes: 1 rim, 1 all-weather net, mounting hardware