Professional aluminum block with sightglass allows for easy visual flow check. Set of 3 60" R134a nylon barrier Goodyear hoses; set of 3 60" R12 nylon barrier Goodyear hoses.. Manual R134a couplers with spring loaded depressor eliminates service valve damage. Silicone dampened flutter free gauges eliminate needle vibrations. Packaged in custom molded carring case with a free MSC85530 3 in 1 can tap Dual 134a / R-12 Aluminum manifold gauge set witha set ofR134a and a set ofR12 Goodyear hoses, manual 134a couplers and field recalibrateable gauges for consistent accuracy. Packaged with the FREE MSC85530 can tap in a custom molded carrying case. Supercedes MSC98660