My local Napa had it in stock with 3 or 4 size diameters. I did have to go behind the counter and show him as he was scrolling down to fast. I got 10 foot of 3 different sizes. Used a stiff flat cable on a reel to push through the loom and then taped the wire to the end, then pull the wire back through. As stated above, ASPHALT COATED WIRE LOOM is what you want. I used it to run my wires to right tail light and then rear to front for my backup light--a John Deere tractor headlight. I used an under dash push pull switch to power it.
