... compressors, machines tools, etc. Options: Contections: NPT, PT, BSPP,UNF,or customizedCustomized dial Pressure Increment: bar, kPa, kg/cm2, ... PSI, or dual.Silicon and mineral oils availableDish-clamp available for 2 ... .5%1/4"NPT DialConnectionPointerBourdon TubeMovement dualbrassaluminiumbrassbrass * Liquid to glycerine or silicon oil * case size 2", 3.5", 4" , ...