12T5/850US Timing Belt Adjustable speed sheaves - QD v=1736973226"

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so a 12/C300 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

The Gates 6000-20M-115 PowerGrip HTD Belts 92930775 is a synchronous timing belt with 20M-pitch profile

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The D&D Global 12/5V500 is a standard V-belt featuring Narrow wedge 5V dimensions

12T5/850US Timing Belt Adjustable speed sheaves - QD v=1736973226"12T5 850US Timing Belt The 12T5 850US is a timing belt from D&D Global's Dura True Torque Urethane Steel T5 Series line. It transmits power positively with no slip, holding timing between shafts on synchronous drives. Specification Value Part Number 12T5 850US Belt Type Timing Belt Tooth Profile T5US T AT metric Tooth Pitch 5 mm Number of Teeth 170 Belt Width 12 mm Pitch Length 850 mm (Pitch Length) Construction Polyurethane, Steel Cable cord, fabric