Version: 4 pieces (compatible with XZERO) This is a set of 4 dedicated casters that can be attached to the STRASSE XZERO cockpit base. Easy installation, simply fix them to the bottom of the cockpit base with bolts. With stoppers, they can be fixed 360 degrees when locked. These are convenient add-on casters for moving or storing your setup. *This is for the casters only. Please purchase the cockpit base frame separately. *Steering wheel, foot pedals, shifter, handbrake, monitor, and game console are not included. Please prepare them separately. [Compatible Base Frame] ・STRASSE Racing Cockpit Base XZERO [Compact Type] *This product requires assembly and installation by the customer. *Installation instructions are not included. Please refer to the product description.