This o-ring is used on the chain of all kinds of motorcycle , scooter, bicycle The material is xnbr. The size is 6*1.8 Its advantage is high wearable and high temperature resistless and low cost Moq:5000pcs Delivery time: within 10 days. Usually 10000pcs in one bag and 30 bags in one carton which means 300000pcs in one carton We could send it to you via express such as ups, tnt, fedex, dhl, ems..... We offer high quality products at a competitive price... Paper box