Features: 1.Applicable Models: Piston pin ring kit is a good replacement for Y?Zinger Jog 2 Stroke 49cc 50cc Moped Scooter Dirt Bike. 2.Size: Piston diameter is about 40mm/1.57in, and the pin diameter is about 10mm/0.39in, with the length of 33mm/1.29in. 3.Glossy Surface: Professional manufacturing, the fine surface treatment produces a glossy appearance with a mirror polished effect. 4.Premium Steel Alloy: The piston ring pin set is made of high quality steel alloy materials, and has the characteristics of high strength, high hardness, not easy to break, antirust and antiaging. 5.High Reliability: The 40mm piston ring kit is professionally manufactured in strict accordance with original standards, reliable quality and stable performance. Specification: Item Type: Piston Ring Kit_x000D_ Material: Steel Alloy_x000D_ Piston Diameter: Approx. 40mm/1.57in_x000D_ Pin Diameter: Approx. 10mm/0.39in_x000D_ Pin Length: Approx. 33mm/1.29in_x000D_ Application: Aftermarket replacement parts, ideal replacement for original damaged worn-out, direct replacement installation_x000D_ Applicable Models: Replacement for Y-Zinger Jog 2 Stroke 49cc 50cc Moped Scooter Dirt Bike