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.
The blanking plug for the 300 bar charging bottle is perfect for protecting the valve outlet threads and it also enables you to see how much Compressed Air left in the bottle before running out!
I always wondered when it's time to fill the main bottle now with this device its easy to see.very easy to use