Specification Brand : Lamons BulletPoint1 : Sterling Seal & Supply, Pure Teflon O-Rings are highly resistant to extreme chemical attacks and have a high resistance to the degrading effects of exposure to such solvents as acetone, MEK, and xylene BulletPoint2 : Temperature Range: -300° to +450°F. Hardness (Shore A): 98 BulletPoint3 : Sterling Seal & Supply TFE O Rings possess average elastomer characteristics of 2,500 to 3,500 psi tensile strength, and 300% elongation, they are tough, impact resistant, low friction, non-twisting performers over an extremely wide temperature range BulletPoint4 : Special care must be taken during handling and installation of PTFE seal. They wont stretch fit as traditional elastomeric O Rings. High Resistance to Ozone and the Effects of Exposure to Solvents BulletPoint5 : Because of its poor tear resistance, during O-ring installation particular care should be taken to avoid nicking or scratching Teflon, as imperfections will cause O-ring leakage Color : White ItemName : Lamons Sterling Seal and Supply (STCC) ORTFE349 Number-349 Standard Teflon O-Ring, Outstanding Weather Resistance, Polytetrafluoro-Ethylene, 4-1/2" ID, 4-7/8" OD ItemPackageDimensions_Height : 0.508 centimeters ItemPackageDimensions_Length : 12.7 centimeters ItemPackageDimensions_Width : 12.7 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : o-ring-seals Manufacturer : Lamons Material : Polytetrafluoro-Ethylene ModelNumber : ORTFE349 NumberOfItems : 1 PartNumber : ORTFE349 Style : OREPD229 UnitCount : 1 UnspscCode : 31401503