Features： 1、Fit for Loncin / BT 110cc 125cc Engine PIT PRO PIT Bike Trail Dirt Bike Thumpstar Quad ATV Go Kart Dune. 2、It is made of high-hardness steel alloy and has been polished many times to have the characteristics of oil resistance, corrosion resistance and durability. 3、It can replace or repair the damaged cylinder piston of the original vehicle, and it can be used for your vehicle with better starting performance. 4、Comes with all the relevant accessories in this package, which is made to meet your needs. 5、High strength, bending resistance, not easy to damage, which makes it durable and firm. Specification： Item Type: Pin Piston Rings Kit Fit Material: Steel Alloy Specification: Approx. 52.4mm/2.1in, 13mm/0.5in Fitment: Fit for Loncin / BT 110cc 125cc Engine PIT PRO PIT Bike Trail Dirt Bike Thumpstar Quad ATV Go Kart Dune Package List： 1 x Piston 1 x Pin  5 x Ring Pad  2 x Fixed Iron Wire