Hi Bill:
Don't remember exactly where I purchased the tape, maybe Lowes/Home Depot or even at Walmart. The tape is approx 3/4" wide by maybe 3'. I used it to mount a GPS holder on my steering column in my truck. When the GPS finally broke (old age) the tape came off in sections. Had to work on it a little, just rubbing my fingers against it to remove it. Nice thing was that it did not leave any tape or glue residue.
Good luck. Again, the lights work great