D&D Global 1245K9 Micro-V Serpentine Belt - K Section, 9 Ribs, 1245mm 5VX so a T20US belt runs

so a T20US belt runs only on T20US pulleys

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D&D Global 1245K9 Micro-V Serpentine Belt - K Section, 9 Ribs, 1245mm 5VX so a T20US belt runsThe D&D Global 1245K9 is a Micro V (multi ribbed) belt with Micro V ribbed K section dimensions, manufactured by D&D Global. Micro V belts deliver smooth, quiet operation with high power capacity in a compact cross section, ideal for serpentine and multi accessory drive systems. Constructed with Neoprene body compound and aramid (kevlar) tensile members for reliable power transmission and long service life. Specifications Belt Section K Belt Type