The Flow Through Sample Cylinder FTC is a shipping bottle designed to transport and store pressurized samples, especially hydrocarbon samples. The two end caps are sealed with double o-ring seals and back-up rings. Both end caps are held in place by strong circlips. Right angle needle valves with 1/4” NPT female port connections are fitted to the 10,000 psi cylinders. Valve protectors on both ends protect the valves during handling and transportation.