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