WRAPPED BELTS V-Belts Wrapped Belts Features One-Shot tensioning makes Fenner Belts "Fit & Forget".Precision Built (PB) advantage completely eliminates the matching codes.Heat Set & Stretch (HSS) Process and HMLS Cords makes Fenner belts carry higher horse power loads with minimum stretch resulting better belt stability.Polychloroprene blended Polyester - Cotton Fabric Jacket makes Fenner belts Oil & Heat Resistant and Anti-Static, Superior Flexibility, better traction and wear resistance.