Uses DuPont Vespel inserts for less friction. Can be cut to desired lenght. Better fuel efficiency, more power and increased vehicle speed, due to reduced friction between the track clips and slides. Reduced need for maintenance and associated costs. Extended life due to enhanced wear characteristics of Vespel polyamide over incumbent UHMW PE. Allows riders to operate sleds in less than acceptable snow and trail conditions since water from snow is not needed for lubricity as with incumbent UHMW PE slide rails. Sold individually.