Champion’s Alley-Oop Mini Hoop Set is built to withstand your most intense play. Featuring a shatterproof backboard that installs easily over most doors and a spring-action rim that bounces back after every dunk. Shatterproof backboard, 18” x 12” Flexible, 9” spring-action rim Includes size 1 (5”) basketball, nylon net and inflation pump with needle Easy, no-tool assembly hangs on most door frames