... case,brass polished case, all this can take with front flange, backflange and U-clamp.BEZEL MATERIAL:Steel ... ), type: snap on, roll ringTUBE&SOCKET: steel with nickel plated, phosphor bronze ,SS and so on ... case,brass polished case, all this can take with front flange, backflange and U-clamp.BEZEL MATERIAL: ... ), type: snap on, roll ringTUBE&SOCKET: steel with nickel plated, phosphor bronze ,SS and so on ...