Strength and Flexibility Temperature and Conductivity Traction Material Don't Care TPU Polyurethane Polyamid Plastic or Fiber Cotton Fiber Polyester Fiber Aramid Fiber Leather Friction Cover Don't Care TPU Polyurethane Hamid Elastomer Polyamid Plastic or Fiber SBR Rubber NBR Rubber (Buna N/Nitrile) Polyester Fiber Cotton Polyester Fiber Blend Leather Reverse Cover Don't Care TPU Polyurethane Hamid Elastomer Polyamid Plastic or Fiber SBR Rubber NBR Rubber (Buna N/Nitrile) Polyester Fiber Cotton Polyester Fiber Blend Leather Minimum Pulley Working Strength (Lbs/inch) Thickness Lowest Temperature Highest Temperature Conductivity Anti-Static Don't Care Texture Texture: Drive Side Don't Care Smooth Cover Friction Surface Brushed Surface Bare Surface Light Impregnation Longitudinal Groove Fine Structure Rough Structure Texture: Reverse Side Don't Care Smooth Cover Friction Surface Brushed Surface Bare Surface Light Impregnation Longitudinal Groove Fine Structure Rough Structure