This is a compact air tank for Pneumatic Retracts by Robart. FEATURES: Aluminum lightweight contruction. Compact design. INCLUDES: One lightweight pressure vessel. One instruction manual. REQUIRES: Pneumatic retract system components. SPECS: Length: 165mm (6.5") Diameter: 45mm (1.773") Capacity: 14.5 cubic inches. Maximum pressure: 100psi 4/10/02 ir/kh