Genuine Pure Polaris Snowmobile Voyageur 550 144"/Indy 144"/Assault/Switchback Adventure Cargo Rack pt# 2879846 Fits Voyageur 550 144", Indy 144", Assault and Switchback MATERIAL: Aluminum ATTACHMENT: Installs securely with 6 fasteners into tunnel's T-slots Stock rack can be attached as extension to Tunnel Rack to carry additional cargo Mounting hardware and instructions included