Review on Stant Metallic Cooling System Adapter: Ultimate Performance for Efficient Cooling by Eric Ross

I ordered an adapter to check the coolant pressure on a 2002 Honda Civic LX 1.7L. The adapter works with both the stant pressure tester and the snap-on pressure tester. (262 episodes). The adapter did not come with instructions on how to use the adapter. To use it, what looks like a single puck (see image above) is actually 4 pucks. You will need to remove the washers one at a time until the adapter fits onto the radiator. (Tighten only by hand) The adapter worked as intended without any defects. If there were instructions for washer sizes I would rate this product a 5 instead of a 4.