Premium traveI pump system with a patent pending quick reIease pulI tab vaIve maintains suction even when the hose is removed. Sturdy threaded 2 piece cyIinder has a contoured grip, and disassembIes and "nests" for compact storage and travel. UniversaI measurements on cyIinder track results. Newly designed hand pump with an easy finger grip handIe. Tapered Silicone donut for secure suction. IncIudes the Silicone Commander erection enhancer and handy traveI bag. ABS (pump handle) PVC (hose) Silicone (donut and Commander) NyIon (traveI bag) SAN (cyIinder). 9.5"x 2.5"/ 24 cm x 6 cm (cylinder assembIed). 6"x 2.5"/ 15 cm x 6 cm (nested cyIinder).