We are currently unable to take orders for this item...the manufacturer, frankly, can't keep employees in the midst of a software change that crushed their ability to fulfill orders.
Calibration gas cylinder recycling kit attaches to the cylinder and pushes the valve into the cylinder. This empties the cylinder of gas and renders it unusable. The cylinder can then be recycled. Fits 17L (7E) or 34L (7H) Cylinders.