... all available. Description of Good Performance O-ring Cord PAHS Approved:1. Materials: can be NR o-ring cord, HNBR, Buna, FVMQ, ... transparent, green, red, yellow, grey, purple, pink thick o ring, etc. or upon your color codes. 6. Processing: all ... PFOA, FDA, NSF, KTW, WRAS, LFGB, etc. 8. Applications: automobile o-ring cord, electrical appliance, mechanical, industrial, construction, household, medical ...