seven corners, My tractor came with a no cushion, no springs - solid seat. I changed the seat over to be like a riding lawn mower; I took the front brackets and sawed them in two, lowered it an inch or so, and put a 5/16 bolt and lock nut for the front hinge, removed the back bracket, and installed a new angle iron bracket with a compression spring (that matched my weight), with a bolt through the center of the spring to keep it from going up too high, so the seat belts still work. Works great for a few hours of tinkering.