... teflon ,ptfe,rubber,nbr,ect 2.various size and color 3.type or structure:TC, TB, SC,ect 4.certificate ... , VC, VB, VA, KC, KB, KA, DC, DB etc, 3. High resistance to chemical agents and solvents 4. Different sizes ... heat treatment/plating/Anti-slipping/Baking/QA/Package/Shipping telfon flat washer specification: metal materialnonmetal materialspecification rangeapplication pressureworking temperatureCu,Mo ...