Cast aluminum and anodized. 
Unique design allows butterfly valve on carb to open fully for top performance. 
Fits 86-95 for Kawasaki and PolarisAdapter required for for Sea-Doo, for Yamaha, and for Kawasaki 96-06. 
Requires adapter for each specific application not listed above. 
Adapter fits WPS cast and UMI billet throttle levers.