New! One Way Check Valve 9/16-18 male to 9/16-18 Female "1lb Check valve"

So this one way check valve is roughly a 1 pound check in place 

Has a 9/16-18 Male for low pressure applications along with a 9/16-18 female end which you twist on and secure with a wrench

Adapter has an arrow showing direction of air flow

The piece is roughly: End to threaded end: 2 1/4" inches

Adapter barrell length is 1 1/4" inches long which does not include the threaded end or the twist on part of this adapter

This adapter is made for low pressure applications