Stant 12040 Cooling System Pressure Tester Threaded 'System' Adapter Stant's Engine Cooling System Pressure Tester adapters make it quick and easy to hook up a Stant Cooling System Pressure Tester to just about any automotive cooling system Many vehicles, due to manufacturer specific cooling system designs, require unique adapters to connect the vehicle's coolant filler neck to the Coolant Pressure Tester The 12040 Tester System adapter allows the testing equipment to attach to vehicle's filler neck Metal construction; anodized finish Fits many late model Ford, Lincoln-Mercury, and Mazda vehicles