COMMANDER ELECTRIC PUMP High vacuum electric pump 3 sleeve sizes for a snug fit Extra large cylinder for maximum enlargement Phthalates free RoHS compliant USB cable included Charging time: Up to 1 hour length 11.5, Diameter 2.75, Circumference 8.75 Three sleeve sizes: (internal diameter of opening) Small 1.125 Medium 1.375 Large 1.5