... THE COMPONENT OF THE REGULATOR PRESSURE GAUGEdiameter:2.5"(optional diameter:1.5",2.0",3.0")way of connection:radial ... (optional:axial)case:golden steel casewindow: snap on ... : 0-10bar,0-32l/min(or as your optional)brass internal and connectionsuitable gas:argonconnection:G1/4"(or ... as your optional, like 1/8",3/8",1/2",bsp,bspt,npt,mpt)optional unit: bar,psi, ...