This 1-1/2 inch by 21 inch blue cam arm strap, with an overall length of 21 inches, secures 3 inch and 4 inch cam-lock couplers on tank trailer hose connections.
The STRAP3-4 is a 1-1/2 inch by 21 inch blue cam arm strap with a 21 inch overall length, used to secure the cam arm of 3 inch and 4 inch cam-lock couplers on tank trailer hose connections.
