BlackStar D80E45 - Double Strand 80 Pitch QD Sprocket - 45 Tooth Tapered Adapter The 16T10/1700US is a timing

The 16T10/1700US is a timing belt from D&D Global's Dura-True Torque Urethane Steel - T10 Series line

3/B135 has a top width of 2

The D&D Global 15/B107 is a standard V-belt featuring Classical B-section dimensions

so a 25T5/765US from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar D80E45 - Double Strand 80 Pitch QD Sprocket - 45 Tooth Tapered Adapter The 16T10/1700US is a timingThe BlackStar D80E45 is a 80 pitch double strand QD roller chain sprocket with 45 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a QD Type E Bushing (sold separately). Specifications Part Number D80E45 Chain Pitch 80 Number of Teeth 45 Maximum Bore 3 1 2" Bore Type QD Hub Style QD Bushing Required QD Type E Bushing Strand Count Double Material