Genuine 3M Clear Electrical Tape
I know there's stuff thats close and maybe a little cheaper but often its narrower and not as many yards per roll. I've done my homework. This stuff is hard to find and it's not cheap. BUT, it's the best, IMO. Rattlesnake RC wants to offer you the best. 

3M Radio Box Tape (1) 3/4"(18mm) X 72 Yard Roll

  • 3/4 inch (18mm) by 72 yards