Product Description We can supply ISO11439: 2000(E) approved certificates for 20L, 28L, 34L, 57L, 77L, 110L 140L and 145L CNG cylinders, service pressure: 200 Bars . High quality cylinders and in time delivery. Standard:ISO11439 (2000E)Productivity: 600,000 pcs/yearUnit Price/Payment: negotiatingOrigin: ChinaMin. Order: one 20ft container