This product used high-pressure, oil-proof, and the composite plate made of asbestos board. Cylinder head using silicone rubber coating, has good oil-proof, high temperature performance, better Sealability, and easy to demolition, non-stick cylinder. According to customer needs, can also adopt the Non-asbestos Sheets, made of non-asbestos. This product is fully adopted ISO9001: 2000 quality system certification.