The Orsil275 Number-275 Standard Silicone O-Ring From Sterling Seal, 3/4" Od. Sterling Seal Supply Silicone O-Rings are excellent seal materials for extreme temperature in static applications. Outstanding flex and fatigue life, very good for ozone and UV radiation, insulating properties, and physiologically neutral. ORSIL275 Product Features Silicone O-Ring, service temperature is -90 F to 500 F (-68 C to 260 C) Sterling Seal Supply Silicone O-Ring, has excellent heat and compression resistance, excellent flexibility, and good electrical insulator Silicone O-Ring, has good resistance to fungal and biological attack At high temperatures, Silicone O-Rings are superior to most other elastic materials Silicone has limitations, Aromatic Hydrocarbons (benzene, toluene), aromatic mineral oil, acids and alkalis, superheated water or steam over 250 F 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!