Description: This Listing Includes ONE BRAND NEW Engine seals set for gy6 49cc 50cc 139qmb motors that are commonly found on scooters, mopeds, ect. Measurements of the big seal: Inner Diameter: 27mm Outer Diameter: 42mm Thickness: 7mm The three other seals are the same size, here are their measurements: Inner Diameter: 16.4mm Outer Diameter: 30mm Thickness: 5mm Fits the following motors: 139qmb, 139qma Please see picture below of seals. Package Includes: 1x Set of Seals _Payment : Shipping and Handling: Free USPS First Class Mail Shipping Return / Refund Return is accepted within 60 days after the buyer receipt the item If this item is damaged or defected 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, 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).