This set of eight 5-foot Black Ice Snowmobile Ski Guides provides a total of 40 feet of guides to protect snowmobile carbides and trailer or truck beds from damage that can be caused when unloading and loading snowmobiles for transport. The 6.375-inch wide ski guides feature a low-profile .25-inch thick grooved surface designed to reduce friction, allowing snowmobile carbides to easily glide along smoothly. These ski guides include recessed mounting holes to create a flush attachment to your trailer or truck bed. Made from durable, long-lasting PVC, these guides won't crack or chip even in extremely cold temperatures. Mounting hardware not included. Take care not to over-tighten the mounting screws as this can prevent your guides from expanding and contracting appropriately with changing temperatures and lead to warping.