Replacement Part Number: This pulley-equipped lawn mower blade adapter serves as a replacement for the 687-02528 adapter blade, 710-1044 hex bolt, and 736-0524B blade bell support washer. Compatible With: The 25mm drive pulley adapter is compatible with Troy-Bilt TB230, TB240, TB260, TB280ES, MTD 12AGA25S011, 12AGA2M6766, 12AGA2MT766, Cub Cadet 12ABA2M5710, 12ABA2M5756, 12ABB22J709. Please check compatibility in the full description. High Quality: The product is made of high-quality bronze material, which enhances reliability and durability. It has undergone multiple factory tests to ensure performance meets industry standards. Easy to Install: Includes bolts and blade gaskets for straightforward installation. To install, clean the shaft, remove the old blade and pulley, then install the new pulley assembly. Package Includes: 1 x lawn mower blade adapter with drive pulley, 1 x blade gasket, 1 x bolt. Specifications: Pulley diameter: 2.8 inches; Inner diameter: 0.98 inches; Height: 2.85 inches. Color: As shown. Material: Steel. Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm. Package content includes only the items listed above; other accessories are not included.