2997L23 (1180L23) Poly V Belt, L Section With 23 Ribs – 2997mm/118.0″ Length. Poly V-Belts combine high flexibility and the light weight of flat belts with the grip of V-Belts, this creates a high power rated special rib profile. Poly V-Belts are endless rubber with V shaped grooves and polyester cord running the length of the belt. They have resistance to mineral oils and can work in temperatures from -30°C to +60°C(+80°C for short periods) and are also suitable for environments of high humidity. L section micro V-Belts have a pitch of 4.70mm and an overall height of 9.50mm.