●Compatible with 5200, 4500, 5800, 58cc, 52cc, 45cc Chinese Chainsaw. ●Chainsaw oil pump with worm drive gear is made of aluminum alloy and plastic for maximum durability, very practical, not easy to break. ●Precise production, stable performance, high reliability of this product. Direct replacement for the old or broken one. ●Package includes 1pc chainsaw oil pump and 1pc worm drive gear.