... ) 1.Professional technology2.UsingOIL ,WATER , GAS.3.Perfect quality and beset service4.Material copper. water meter shell mold1.Measuring the total volume ... .3.This is a multi-jet impeller meter with a drive magnet and a internal dry type register.The impeller movements is ... sealed register, which the reading is made.4.With every water meter(threaded ends), there are 2 couplings, 2 coupling nuts, ...