1.material:teflon ,ptfe,rubber,nbr,ect 2.various size and ... , SC,ect 4.certificate:ISO2001 teflon flat washer describle:1. Material: teflon,NBR, SILICONE, VITON,HNBR, CR, PTFE, EPDM, etc. ... plating/Anti-slipping/Baking/QA/Package/Shipping telfon flat washer specification: metal materialnonmetal materialspecification rangeapplication pressureworking temperatureCu,Mo,Nipure teflonreinforced teflonglass ...