BlackStar 80R72 - 80 Pitch R Sprocket - 72 Tooth XPC Section What does the XXH in

What does the XXH in 1200XXH500 mean

com/s/files/1/0666/7721/products/Banded_VF_Belts_c7ba4093-cfb2-424f-bb34-39c6fb9f1f40

"sku":"120-S8M-1008-D&D"

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so a 32AT10/1010US from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar 80R72 - 80 Pitch R Sprocket - 72 Tooth XPC Section What does the XXH inThe BlackStar 80R72 is a 80 pitch R roller chain sprocket with 72 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Requires a Split Taper Bushing (sold separately). Specifications Part Number 80R72 Chain Pitch 80 Number of Teeth 72 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Outside Diameter 23. 50" Pitch Diameter 22. 926" Approx. Weight 69. 400 lbs