The AL-KO SL530069225 is a genuine OEM blade holder assembly with an integrated V-belt pulley, specifically designed for various AL-KO and Solo by AL-KO lawn tractor models. This essential component ensures efficient power transmission from the engine to the mower blades, facilitating precise and effective cutting. It features a pulley diameter of 170 mm, an overall height of 120 mm, and shaft diameters of 22.2 mm (top) and 25 mm (bottom), with a 4.5 mm keyway. This durable part is crucial for maintaining optimal performance and reliability of your lawn tractor's mowing deck, supporting two blades.