This ramp is made of 3 pieces of coroplast 4.5 inches wide (Slap's idea) super glued together. I covered it with a piece of towel that I zip tied to the ramp at the top and the bottom. The ramp is zip tied to the grid on the bottom of the top level.
Actually, the ramp is at least 6 inches away from the sides of the cage. My piggies run up and down like it's nothing. Mia likes to sit at the top and use it as a look out.
