Consisting of 4 sizes of V-grooved wheels and hardened steel raceways, V-Guide system comes in carbon steel and stainless steel, with stainless steel mounting bushings. Track is available with predrilled mounting holes in lengths to 20 ft. V-shaped way configuration is self-cleaning, due to slight velocity gradient produced by change in wheel diameter over wheel to track contact patch. Permanently lubricated wheels have dual-row ball bearing construction.