Poly-V Sheaves & Belted Drives - TB Wood'sThe Wood's Poly-V sheaves include four cross sections: J, K, L, and M. The J section sheaves are stocked in a Sure-Grip QD Style and also bored-to-size for Poly-V Sheaves - Altra Industrial MotionThe Wood's Poly-V sheaves include four cross sections: J, K, L, and M. The J section sheaves are stocked in a Sure-Grip QD Style and also bored-to-size for 
Poly V Sheave - B&B ManufacturingB&B Manufacturing ® stocks poly-V belt sheaves in black oxide coated steel for 6 groove, 10 groove, and 16 groove J section Poly-V belts. ISO Certified.