Polypropylene Washers , PTFE Washers ,Polythene , ABS , HIPS , Nylatron , Mylar , PVC Acetal Delrin Polycarbonate Polyurethane Washers Gaskets Strips Rubber, Foam, Nylon, and All Non- Metallic Washers, Gaskets, Rubber Strip, Seals ibre gaskets can be supplied in any shape from simple round or square?designs to a?non compressible fibre?gasket with numerous holes and slots cut out of it in a bespoke design?