Gaslow - 21.8LH Adapter Gauge-Propane - Part No: 01-1607
The Gaslow Propane 21.8LH Adapter Gauge screws onto a 21.8LH cylinder connection.
Ideal for the Gaslow Refillable Cylinders
Compatible with all Gaslow 21.8LH Stainless Steel and Rubber hoses and 21.8LH Propane 37mbar regulators (01-4337).
It provides a visual warning of low gas levels with the Green/Yellow/Red display
Secondly, it operates as a quick and easy leak detector!