The product consists of a rectangular cross section PTFE tape with a self adhesive backing strip. The tape is fixed around the sealing face of one flange, slightly overlapped, and then the flanges are bolted together forming an extremely chemical and solvent resistant seal. Other products you may also interested: 1. Fluoroplastic sheet 2.ptfe gasket ring 3.ptfe adhesive tape 4.ptfe gasket sheet 5.ptfe envelope gasket