FEATURES: Vacuum Pump Seals for Penis Pumps Adds comfort while pumping Creates air-tight seal Compatible with all water-based lubricants Non-latex, Hypoallergenic and phthalate free Colors may not correspond with size as they are randomized. Materials: Rubber Package include: 3pcs/set Penis Pump Rubber Sleeves NOTE: All items will be cautious to sended to buyer,so no one saw what was inside. Manual measurement, there may be errors, please understand, thank you. Due to different shooting environments, please allow a little color difference.