XRAY made XB8'20 Aluminium Swiss 7075 T6 3mm (351114) Redesigned XB8 chassis is longer for increased stability and wheelbase adjustability to suit different track conditions. The chassis is CNC-machined from 3mm high-quality Swiss 7075 T6 aluminum; strategically machined in low-stress areas and then anodized to make it as light as possible without affecting strength or rigidity.