SWFR tubing from TE Connectivity (TE) is cost effective, highly flame-retardant; 2:1 shrink ratio tubing made irradiated, cross-linked polyolefin. It insulates and mechanically protects components, electrical connections, and terminations.SWFR tubing from TE Connectivity (TE) is cost effective, highly flame-retardant; 2:1 shrink ratio tubing made irradiated, cross-linked polyolefin. It insulates and mechanically protects components, electrical connections, and terminations.