... 4NPT etc. 63mm(2.5") Oil filled pressure gauge YN63C BRIEF INTRODUCTION Oill filled pressure gauge is filled with damping liquid good ... chemical, Power stations, etc. DESCRIPTION Nominal Size : 1.5"(40mm) , 2.0"(50mm), 2.5"(63mm), 3.0"(75mm) ,4.0"(100mm),Pressure ... /Filling cap: Neoprene Or Silica gelOPTION 1. With red mark adjustable pointer , 2. With othe unit according requirement, such as bar,psi ...