This Chassis is made from DOM. There are two wall thicknesses, the majority of the tube is 1 3/4 x 120 wall but the belly and sliders are made of 1 3/4 x .188 for superior strength and durability. The chassis is fully CNC manufactured with laser etching for both line up marks and tube part numbers. This chassis can easily be tacked together in a day. We will be offering a lacing tube kit aswell that will make finishing this chassis into a race safe assembly a snap.