5” Long Plenum Cable Tie BLUE holds drop wire to the cable strand & groups cables together. 4” Cable Tie BLUE is approved in applications of air handling spaces where low smoke & flame are a concern. Tensile strength of 4” Cable Tie BLUE is 40 lbs. Single piece construction of filtered nylon reduces particle contamination & increases durability. Cable tie design consists of unique angled head for quicker initial insertion alignment & gripped tail finger for easier handling & tightening. The rounded edges insure added safety & eliminate possible insulation damage.