Gibraltar GPO8 5 Piece Practice Drum KitThe four 8" rubber pads are designed for a natural rebound and super low volume practice sessions. The kit includes the Gibraltar 10" bass drum practice pad with air channel design. The pad connects to both sides of the mini rack and to the bass drum pedal receiver. Connect the bars, quickly and easily spin the pads onto the arms, set to your desired height, fit the bass drum practice pad and you're good to go. When you're done, loosen the clamps and