A Taprite Co2 double gauge regulator with 5/16 shutoff, lets you know how much gas you have left in your tank so you don't run out at a really bad time. Other gauge lets you see how much pressure you have on your keg. Regulators come with a nylon washer to go in between it and the Co2 tank for a sure seal.

This is a Taprite Regulator The tank gauge goes up to 60 pound and the other 2000 pound. This has 5/16" shut off with check valve. high flow primary regulator.