Specification Brand : Mr O-Ring BulletPoint1 : Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids and hydrocarbons BulletPoint2 : Can be used across a wide temperature range from -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C) BulletPoint3 : Round in cross-section to provide a seal between cylindrical overlapping surfaces BulletPoint4 : Durometer (hardness) of 70A for resistance to penetration BulletPoint5 : Meets standards defined by Aerospace Standard AS568A Color : Black ItemName : 427 Buna-N O-Ring, 70A Durometer, Black, 4-3/4" ID, 5-1/4" OD, 1/4" Width (Pack of 10) ItemPackageDimensions_Height : 2.794 centimeters ItemPackageDimensions_Length : 20.32 centimeters ItemPackageDimensions_Width : 15.24 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : o-ring-seals Manufacturer : Small Parts Material : Nitrile Rubber ModelNumber : 427 NumberOfItems : 10 PartNumber : ORB-427-10 Size : 427 UnitCount : 10 UnspscCode : 31400000