1) Aluminium Casing. 2) G1.6, G2.5, G4. professional supplied. 3) Ready to Aply for ... , is the current international advanced one gas meter.Its technical performance indicators are in line with GB / T 6968-1997 grade ... , Intelligent gas meter, Remote control and Prepaid gas meter. G1.6, G2.5, G4.0 G6.0 G10, G16,G25,G40 ...