... K-2Environment friendly, flexible, flame-retardant polyolefin tubingApplicationKOSOO K-2 is environment friendly, flexible, flame-retardant, irradiated crosslinking ... polyolefin tubing. Unlike other typical flame-retarant tubings, K-2 is free of PCBs, PCPs, polybrominated biphenyls (PBBs ... (-YL), green (-GR)Nonstandard: Brown (- BR), orange (-OR), violet (-VT), gray (-GY), yellow & green stripe (-GYS)