9.5 inches by 2.75 inches cylinder. Take serious pumping to a whole new level! American Pumper’s Association. High quality, heavy duty pump with oversized flanged cylinder with universal incremental measurements. EZ-Squeeze trigger handle. Push button release valve. Tapered Silicone secure fit donut. Flexible non-crimping air hose. Safe and pure for body and pleasure made using phthalate free materials: SAN cylinder, ABS plastic handle, ABS plastic with silver plating handle grip, Silicone donut, POM release valve, Phthalate free PVC hose.