This is the Robart 180 XS Air Tank This is the air tank included with the 510 economy series air systems from Robart, ROBQ2387. FEATURES: Constructed of aluminum with a steel cap Safe for air pressure up to 100psi Can be used with air systems using 1/16" diameter air tubing INCLUDES: One 180 XS air tank One 186 control valve installation sheet REQUIRES: Air system using 1/16" diameter tubing SPECS: Length: 4.25" (108mm) Diameter: 1.39" (34mm) wm 7/12/05 ir/jxs