Motor Hub Coupling RR91040713 2 7/8 5.25 SPA Flange Hub Black Industrial OEM Condition: New Open Box Features: Flange-style hub with multiple bolt holes, set screw visible, includes bagged mounting hardware Material: Metal with black protective finish Tag size: RR 91040713 printed on box label Color: Black Perfect for: Industrial motor coupling replacement, equipment repair, or retrofit projects See photos for close-up of condition and accurate sizes.