Sterling Seal And Supply Offers 218 Buna/Nbr Nitrile O-Rings In A 500-Pack With Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light. Product Features Made of Black Buna-Nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons O-ring Size - Actual (b) per AS568A Metric O-ring Size per AS568A (b)ID (Nominal): 1-1/4 OD (Nominal): 1/8 CS (Nominal): 1-1/2 Durometer (hardness) of 70A for resistance to penetration Round cross-section to provide a seal between cylindrical overlapping surfaces For use across a wide temperature range from -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C) 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!