3M Temflex 1700  Vinyl Electrical Tape General Use - 1 in x 66 ft. (25,4 mm x 20,1 m), open box sold per roll  80-6112-0577-6  ESCS recommends this economical solution for less demanding indoor jobs. Comes on a 1 1/2 inch core, black, 7 mil economy-grade vinyl tape serves as a general purpose tape.