BlackStar 1C75SF - QD Sheave flexco-sr-r512 The D&D Global 1184-8M-450 is

The D&D Global 1184-8M-450 is a synchronous timing belt with 8M-pitch profile

6/C204 is a banded v-belt used on industrial drives - fans and blowers

"mpn":"100AT5/390R-D&D"

so a 2/5V3800 from any major manufacturer shares the same cross-section and length and runs on the same sheaves

"name":"D&D Global 6/BX137 Premium Cogged V-Belt - BX Section

BlackStar 1C75SF - QD Sheave flexco-sr-r512 The D&D Global 1184-8M-450 isThe BlackStar 1C75SF is a 1 groove qd sheave, manufactured from cast iron. Requires a QD Type SF Bushing (sold separately) to mount to your shaft. Specifications Part Number 1C75SF Product Type QD Sheave Number of Grooves 1 Outside Diameter 7. 90" Material Cast Iron Approx. Weight 1. 00001 lbs Belt Profile C Bushing Required QD Type SF Bushing Pitch Diameter 7. 5" Compatible Belts C Bushing Required This sheave requires a QD Type SF Bushing to mount