1) Aluminium Casing. 2) G1.6, G2.5, G4. professional supplied. 3) Ready to Aply for ... ³/hourMax Flux4 M³/hourMin Flux0.025 M³ /hour By the way, We still offer the models likeIC card gas meter, Intelligent ... gas meter, Remote control and Prepaid gas meter. G1.6, G2.5, G4.0 G6.0 G10, G16,G25,G40 ...