This blanking plug from Hydro Tech allows you to find the pressure of a 300 bar air rifle charging cylinder. Simply screw in, turn on and read the pressure available from the bottles gauge. It will also protect the screw threads on your cylinder valve and keep it free from dirt during transportation.

Only for use on 300 bar airgun charging cylinders with an integral pressure gauge and a bleed valve.

Please note: only use this adapter if your valve has an integral gauge & bleed.