High vacuum electric pump 3 sleeve sizes for a snug fit Extra-large chamber Waterproof Phthalate free RoHS compliant Materials: silicone, AS, ABS, PVC Pump size: Length – 13.375in., Diameter – 2.75in., Circumference – 8.75in. Three sleeve sizes: (internal diameter of opening), Small – 1.125in., Medium – 1.375in., Large – 1.5in. Voltage – 3.2V Rechargeable Charging time: Up to 1 hr. Use time: 1 hr.