... 3.type or structure:TC, TB, SC,ect 4.certificate:ISO2001 teflon flat washer describle:1. Material: ... teflon,NBR, SILICONE, VITON,HNBR, CR, PTFE, EPDM, etc. Can choose on your requirement;2. types: TC ... Anti-slipping/Baking/QA/Package/Shipping telfon flat washer specification: metal materialnonmetal materialspecification rangeapplication pressureworking temperatureCu, ...