The 2 1/2 inch oxygen high pressure gauge measures the supply or cylinder pressure on an oxygen regulator.  The single scale, PSI only gauge is easier to read.  A full cylinder is usually 2200-2400 PSI depending on the cylinder rating.

Features:

• Single Scale
• 2 1/2" Diameter
• 0-4000 PSI
• 1/4 inch NPT inlet threads
• Steel Case