240 Pcs. In 12 Different Sizes Of Nbr Metal Bonded Sealing Washers, Metric Nbr Product Features MATERIAL: High quanlity NBR ring with carbon steel, good sealing. Anti static, high pressure resistant, oil resistant, corrosion resistant, UV resistant, heat resistant, wear resistant, durable and long service life. Quantity: 12 Sizes,240 Pieces rubber metal combination O Ring gaskets, meet almost all your needs. PRODUCT FEATURE: Reliable low and high pressure sealing, High and low temperature capabilities, Bolt torque is reduced with no loss of tightening load. Bonded washers are used extensively for sealing under the heads of bolts in high pressure applications where coppers washers would be unsuitable. They are often used in hydraulic and pneumatic connections that are subject to extreme pressures. WIDE APPLICATION: Oil pipeline system as a medium, for mechanical device, to prevent oil, fuel, water and gas leakage, etc. Great for high pressure fuel systems, brake caliper banjo bolt, brake master cylinder, fuel line bolts and water line bolts in turbos, automotive replacement drain plug gaskets, etc. EASY TO USE PACKING: All O-rings are stored in a sturdy plastic box with labels, that avoids the trouble of sorting and selecting the size. Variety of thickness and size are all in one box, very convenient to use. INTERNAL DIAMETER: ?6(6mm), ?8(8mm), ?10(10mm), ?12(12mm), ?14(14mm), ?16(16mm), ?18(18mm), ?20(20mm), ?22(22mm), ?24(24mm), ?27(27mm), ?30(30mm). ?Metric, Please See Picture 2 for Specific Dimensional Size? Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!