Features: 1.Perfect Fitment: Chain slider tensioner roller fits for ATV Coolster Go Kart 110cc 125cc 150cc 200cc 250cc, perfect matching. 2.High Quality Material: Chain tensioner guide is made of high quality steel alloy and ABS material, rustproof, wear resistant, sturdy and durable. 3.Excellent Performance: Chain roller guide tensioner is not easy to oxidize, deform and bend, stable performance and high reliability. 4.Professional Design: Professional manufacturing, exquisite workmanship, keeps chain from popping and snapping, have a long service time. 5.Easy Installation: Easy to install, adjust the chain automatically, convenient for using, save your time and energy.Item Type: Chain Slider Tensioner RollerMaterial: Steel alloy+ABSApplicable Chains: Use 420 428 and 530 chainsApplication: Aftermarket replacement for the original spring bearing chain idler tensioner and pulleyFunction: Protect the swing arm and help guide the chain correctly, prevent the chain derailment, sprocket excessive wear, prolong the life of the chain.Fitment: Fit For ATV Coolster Go Kart 110cc 125cc 150cc 200cc 250cc1 x Chain Slider Tensioner Adjuster1 x?Axle1 x Spring1 x Replacement?Roller