Is it 'duct' or 'duck' tape?

Duck Tape 1.88 In. x 20 Yd. Colored Duct Tape, Beige

Is it 'duct' or 'duck' tape?

What's the difference between duct tape and Duck Tape®? - Tape University®

Duct Tape, Duck Brand Original Strength 55 Yard x 2 Inch Roll

All Purpose Duck Tape Brand Duct Tape-Silver 1.88 Inch x 60 yd - 394475

Duck Tape Woodgrain, 10 yd

Duck Brand 392873 White Color Duct Tape, 1.88-Inch by 20 Yards, Single Roll

Maximum Strength Duck Brand Duct Tape, Hobby Lobby

DUCK TAPE Duck Tape 222226 Duct Tape, 50m x 50mm, Silver, Gloss Finish

Duct Tape, Duck Brand Max Strength 45 Yard x 2 Inch Roll

The Original Duck Tape Brand Black Duct Tape is the classic tool for temporary repairs and everyday fixes. Featuring strong adhesion, this

The Original Duck Tape Brand Duct Tape, Black, 1.88 in. x 45 yd.

Recommended for temporary household repairs including holding, seaming, sealing and bundling Works on a variety of surfaces, including wood, vinyl,

The Original Duck Tape Brand 761288 Duct Tape, 1-Pack 1.88 Inch x 10 Yard Silver

Duck Tape® Brand Duct Tape - Black, 1 ct - Fred Meyer

The Original Duck Tape Brand 1.88 in. x 55 yd. Black Duct Tape

Duck Brand Transparent Duck Tape @ FindTape