... both avaliable 3.Packing:carton Detailed InformationThe non-asbestos sheet is made from asbestos fiber, natural rubber, filling material and dye ... white, etc. DONGFENG PTFE encapsulated non-asbesto gasketProduct FeatureCorrosion resistantHigh temperature resistanceInnocuous and non-stickingGood elastic and sealing performanceTechnical ... :http://www.chinaptfe.com 100% PTFE Envelope non-asbestos Gasket