... Design; crankcase ,starter assy and brake park all use the magnesium alloy; artistic and durable Little brief of OU-GS50001 ... pipe bending, more strong and durable. What’s more, the skin use tearproof material, soft and shock absorption.5, GS5000 ... , metallic simple sense obvious, have the most attraction to market.8, GS5000 have CE,GS certificate. Professional 50cc chain saw with CE certificate