This Barnett Scorpion Series clear derby cover is designed to fit OEM primary covers on 1990-97 Harley Davidson Big Twins and features a quarter inch thick, clear polycarbonate window to your clutch! The scratch and discoloration resistant window is firmly secured and sealed with an o-ring gasket. The outer cover area is CNC machined from billet aluminum and powdercoated in black. The derby cover gasket is also included. For the ultimate in looks AND performance, install a Barnett lock-up clutch with your new cover!