GASCO Hydrogen Sulfide (H2S) Balance Nitrogen contained in a 34 Liter Factory Refillable ecosmart Aluminum Cylinder, For Use with Any and All Gas Detectors, Cylinder Connection C-10, Calibration Certificate NIST, Made in the USA

The GASCO ecosmart cylinder program is an environmentally-friendly way to reduce waste caused by empty disposable calibration gas cylinders. GASCO ecosmart cylinders are Factory Refillable, and Ship back Free to GASCO for future use. All GASCO ecosmart cylinders ship with a Free eco MT plug which ensures the cylinder is empty and ready to ship back to GASCO.