HOKE Sampling Cylinders are designed and manufactured to stringent U.S. Department of Transportation (DOT) and or TPED specifications to provide long performance life and maximum safetyto the user. These cylinders are fabricated from seamless tubing or pipe with increased wall thickness in the threaded area, which prevents expansion when valves are installed. Completely formed ends maximize strength and eliminate potential leak paths. Internal sandblasting removes surface imperfections and removes foreign particles. Single- and double-ended cylinders are available as standard in a variety of capacities from 10 milliliters to 4 gallons and materials like SS316, Monel, Hastlloy, Inconel etc