Polypropylene solid-front pressure gauge series MNSSCF is ma-nufactured in according with safety expecifications of UNI 8451, DIN 16006 and ANSI B40.1. They are applied to the food, drink, refrigeration, petrolchemical processing and so on, and the oc-casions where both environment and medium are strict. The case is solid with knock down back case and burst disk inside.