Fit engine model: Stihl FS38,FS85,BG55 (Gasket & diaphragm set ZAMA GND-56) ... stability, repeatability, endurability and difference on the various pose when engine is running. It is the most common spare part for ... glass), according to required temperature,pressure,two or four cycle engine, and resistance of oil,corrosion and wear. The punching die ...