Adhesive backed fabric specifically for creating a spike mark. Same as 1/2" wide gaffers tape. Preferred by stage managers, often sold in shorter rolls with a smaller core diameter than the standard 50-66 yards long gafftape roll.
One vendor's offerings:
Pro-Gaff Cloth Spike Tape, 1/2" (aka Gaffer Tape)
Another vendor: what is spike tape?
One vendor's offerings:
Pro-Gaff Cloth Spike Tape, 1/2" (aka Gaffer Tape)
Another vendor: what is spike tape?