Belcon Engineers Pvt. Ltd. Manufactures Polyflex Wide Angle V Belts. Belcon Engineers Pvt. Ltd. Offers Conveyor Belts, Timing Belts, Nylon Flat Belts, Poly V Belts, etc. In Polyflex Wide Angle V Belts, the wider 600 angle gives it a distinct advantage over the conventional V belts. Polyflex V Belts are available in 3M, 5M, 7M & 11M sizes.