The belts exceed USA RMA published ratings levels; They are designed to perform at the identical or higher level than all other major USA Manufacturer's belts of the same type
1136-8M-19 Synchronous Timing Belt OEM Part Number 1136-8M-19 Belt Type 8M Timing Belt
Technical Specifications: (Inches) (mm) Outside Circumference 44.72 1136 Top Width 0.75 19 Belt Depth 0.24 6 Material Neoprene Tooth Profile 8M