This tabletop punch bag is compact and made with excellent materials.It feels good to the punch, does not leak, and has strong elasticity, so it will return after many times of strike, and is recommended for stress relief and boxing practices! Specifications: Material: Stainless steel + PU; Ball Size: 6.7 inches (17 cm); Overall Height: Approx. 15.4 inches (39 cm); Weight: Approx. 22.1 oz (619 g); Package List: 1 x Punch Ball, 1 x Suction Base, 1 x Pump, 1 x Valve, 1 x Spring