The couplers are CNC machined out of aluminum and coated with a textured black coating. They have two counter sunk mounting bolts to secure it to the vehicle and one 1/4" NPT input for the air line and one 1/4" NPT output to mount a quick coupler air chuck. This is a very secure mount that you will not have to worry about pulling off of the vehicle when connecting and disconnecting your air line.
This is just the aluminum base unit.
If you would like a mount kit with fittings, coupler and cover check out the CPLR-A and CPLR-ARB.
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