This is a rare vintage antifreeze tester from the 1950s, model #5400-S6, designed for testing radiator solutions. It comes with 3 New in original box additional Testing ethylene and alcohol thermometers and the tester is in its original box. This vintage piece is in excellent condition. All lettering on glass tester and box is in perfect condition. This is a rare find, picked up at a army estate sale. Please look over pictures as they are part of the description. Sorry no shipping outside the United States. Will come from a smoke free, pet free home. Thanks for looking.