Specification Brand : TRUE BulletPoint1 : A Copper Gasket is used to mate two Conflat (CF) vacuum flanges together. These conflat copper conflat gaskets fit a conflat flange size of 2-1/8 inches. BulletPoint2 : The gasket material sealing two flanges determines the joint's maximum temperature and, to an extent, the base pressure of the vacuum volume. BulletPoint3 : Metal gaskets are impermeable to gases and withstand moderately high temperatures indefinitely. BulletPoint4 : The normal gaskets for stainless steel CF flanges are punched from 1/4 hard, high purity, oxygen-free (OFHC) copper stock. BulletPoint5 : The gaskets are then chemically cleaned and processed to minimize scratches and burrs. ConFlat (CF) flanges are used for ultra-high vacuum applications. ExternallyAssignedProductIdentifier1 : 0767674705821 ExternallyAssignedProductIdentifier2 : 767674705821 Hazmat : auto-grounding ItemName : TRUE 810713 Black Gasket For Tssu/Tuc/Twt-36 by TRUE ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : formed-in-place-gaskets Manufacturer : Prtst Material : Copper ModelNumber : 1701192 NumberOfItems : 1 PartNumber : 4705821 ProductDescription : DART MOUNTED MAGNETIC DOOR GASKET, 16-7/8" X 26-1/4"MAG 7/16", BASE 3/4", HIGH 7/16"BLACKTRUE TSSU/TUC/TWT-36 SupplierDeclaredDgHzRegulation : unknown