3M 4-50-3903-GREY Duct Tape,Gray,4 in x 50 yd,6.5 mil | eBay
Fixman 189098 Heavy Duty Duct Tape 50 mm x 50m Silver : Amazon.co.uk: DIY & Tools
Duct Tape Heavy Duty Waterproof, High Viscosity Gray Tape, Tear By Hand Duct Sealing Tape, No Residue Strength Duct Tape for Indoor, Outdoor, All Weather (0.6 Inches x 21.8 Yards) : Amazon.co.uk: