Hy Matthew Blair, there are a couple of choices depending on whether or not you have the heavy duty brakes, numbers are United, I was unable to cross them into Napa numbers
15" X 5" 80168, 2 each yellow 3 1/8" long, 2 each black 5 5/8" long, 2 sets required per axle
15" X 4" 80169 8 each gray 3 1/8" long, hope that helps.
