High vacuum electric pump with 3 sleeve sizes for a snug fit. Extra large cylinder for maximum enlargement Material: silicone, AS, ABS, PVC Pump size: 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" Cord length: 51" USB cable included Rechargeable - no batteries necessary Charging time: Up to 1 hour