The Topeak Pressure Rite Shock Adapter is a Schrader valve adapter allowing the use of the JoeBlow Ace floor pump for quickly pumping forks and rear shocks. Built-in air release knob allows fine tuning air pressure. Keep your Topeak Pressure Rite Shock Adapter to hand to make sure your full suspension bike works beautifully on all trails. Features: Brass main body Built in check valve Adaptive pressure tuning Dimensions: 4.2 x 3.2 x 1.1 cm Weight: 23g