water film diameter: 76mm,74mm,54mm or 49.6mm for choice customer: Macro,Vanvard,Vatti,Chinabest water film and membrane ---parts of gas water heaterDetailed Product Descriptionwe supply primary part for gas water heater good quality for Macro,Vanvard,Vatti,Chinabest etc gas water heater partnote:our spare parts are professional for the chimney instant gas water heater only.Our main parts cover:1 ...