Premium travel pump system with a patent pending quick release pull tab valve maintains suction even when the hose is removed. Sturdy threaded 2 piece cylinder has a contoured grip, and disassembles and nests for compact storage and travel. Universal measurements on cylinder track results. Newly designed hand pump with an easy finger grip handle. Tapered Silicone donut for secure suction. Includes the Silicone Commander erection enhancer and handy travel bag. ABS (pump handle) PVC (hose) Silicone (donut and Commander) Nylon (travel bag) SAN (cylinder). 9.5x 2.5/ 24 cm x 6 cm (cylinder assembled). 6x 2.5/ 15 cm x 6 cm (nested cylinder).