The pan is made of 1/8 inch thick steel. This makes it a very rigid and strong seat pan, that will be able to take a lot of abuse. I wouldn’t think of using aluminum pans like some other manufactures use, because all the weight of the rider is resting on the welded bolts, and when aluminum is put under stress it tends to crack. The pan measures 9″ wide by 12″ long. The studs in the rear are spaced 7 apart. Custom sizes are available. I use closed cell neoprene foam on my seats. Closed cell means that the foam is made up of many micro pockets of air. This provides better cushioning than open cell foam because open cell foam lets the rider bottom out. This allows me to be able to give the seat a more s.