They are very nice quality, sturdy frame and double stiched seams. They are Monza seats by Autotechnica. I am very pleased with them.I had to make mounting brackets for them out of steel plate and I am going to have them powder coated black. That Macsimizer is one of my coworkers. I have a MAC MB1800 with side cabinet. It was green but I sanded it all down(inside the drawers and all) and had it painted a graphite metallic.