Heavy duty nylon wrench for oxygen cylinder 870 post valves. This wrench will not round out with heavy use like a lot of wrenches will.  This wrench comes without the 10 inch chain.  This wrench is black in color.  It is also available with a 10 inch chain.  Part Number ACM 191C10.

The wrench is also available in green.  Green with the chain is part number ACM 142C10P for $13.96 per bag of 50.  It is available without the chain.  The part number is ACM 142P.  The green wrenches are pad printed with "OFF/ON" and the direction to turn the wrench.  The price is $11.17 per bag of 50.  The black wrench is not printed.