3" x 30 yds. Black Gorilla® Duct Tape. An incredibly strong adhesive for the toughest jobs. Double thick adhesive fills in gaps on rough, uneven surfaces for extra grip. Tough, reinforced backing contributes to the tape's durability and strength, but it can still be ripped by hand. Rugged, weather-resistant shell helps create a barrier that can withstand harsh elements. 17 Mil.