Type2 CNG Cylinders are of an steel liner and glass fiber hoop-wrapped composite design. The Type 2 design is higher cost than Type 1, but lighter weight. Type 2 is the most popular cylinders in China and South East Asia. The cylinders are designed and manufactured to the ANSI NGV 2 — 2007 & FMVSS — 304, ECE R110-2, ISO 11439-2, NZ5454-2.