Gc Petro Online Liquefied Gas Injector Cylinder of Laboratory Solutions. Seamless Spun Construction: Formed by one-step spinning process with no weld defects for superior strength. High Pressure Capacity: Available in ratings up to 5000psi (345 bar) for safe LPG sampling. Wide Capacity Range: Options from 50ml to 10000ml to suit various sampling needs. Safety Rupture Disc: Equipped with explosion-proof pressure relief device working at 870psi or 3600psi. Dual-End Design: Features double-ended cylinder body with female 1/4 inch NPT threader ends. Patented Technology: Holds Chinese patent certificate (ZL 2011 20094190.X) and national production license.