**********Premium quality Plenum rated and UL Listed electrical cable ties manufactured from industrial strength flexible nylon material for long lasting product performance*****Bundle diameter 7.17 inch (182mm); Operating temp minus 40 degrees Fahrenheit to 185 degrees Fahrenheit; rounded tip prevents users form cutting themselves on sharp edges*****Connect flexible duct in HVAC applications and for use in industrial settings; ideal for commercial use and construction; merchandising product; hanging signs and banners and so much more; cable ties are the perfect choice for your cable management organizational or bundling projects*****UL 181B-C Listed; Plenum Rated HVAC; Investigated to ANSI/UL 181B and have also been tested to UL 2043; Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces; these products have been found to be suitable for use in plenums in accordance with the International Mechanical Code; Uniform Me