BlackStar 2VP36 5/8 TYP4 STL - Variable Pitch Sheave - 5/8 TYP4" Bore Series-M 3/A91 is a banded v-belt

3/A91 is a banded v-belt used on industrial drives - fans and blowers

Prefer our D&D Global equivalent: 8/B112 Banded V-Belt

Megadyne 3/C136 Banded V-Belt

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so the Megadyne 9/B210 interchanges with Gates

BlackStar 2VP36 5/8 TYP4 STL - Variable Pitch Sheave - 5/8 TYP4" Bore Series-M 3/A91 is a banded v-beltThe BlackStar 2VP36 5 8 TYP4 STL is a 2 groove variable pitch sheave, manufactured from cast iron. Specifications Part Number 2VP36 5 8 TYP4 STL Product Type Variable Pitch Sheave Number of Grooves 2 Bore Size 5 8 TYP4" Material Cast Iron Approx. Weight 3. 4 lbs Belt Profile A B (Variable Pitch) Cross references: Browning 2VP36 5 8 TYP4 STL