2"x60YD Silver Contractor Grade Duct Tape that is 11.5 mils thick and very popular for contractors and maintenance workers because of its dependable performance. The natural rubber adhesive holds strong for demanding HVAC jobs, splicing and holding almost anything, especially plastic polytarps. Tested to meet UL 723. (24 rls./cs.) 1 case min, non stock item allow 1-2 week lead time.