This Piston kit is NEW for 150cc scooters, UTV, ATV'S, wiht Gy6 style 4 stroke Engines 5x Rings 2x clips 1x piston 1x piston rod holder 15mm x 42.5mm please see pictures SIZE PISTON HEIGHT: 38.5MM DIAMETER OF THE PISTON:57.4MM Shipping and Handling: FREE USPS First Class Shipping Return / Refund Return is accepted within 60 days after the buyer's receiving the item. If this item is defective upon receipt, customer has up to 60 days from date of receipt for exchange of a new one. Include your name, address, item, daytime telephone, how you paid, and if you are requesting a refund or exchange. After getting the returned item, we will refund the customer at the item's price (excluding the shipping costs to and from).