The Case IH W21020100DS is a genuine OEM grooved pulley designed for various agricultural machinery, including Case IH Axial-Flow Combines (1400, 1600, 2100, 2300, 2500, 5088, 6088, 7088, 7120, 7230, 8120, 8230, 9120, 9230 series), Cotton Pickers (1800, 2000, 2100, 2500 series), Forage Harvesters (781, 782, 881, 882, 8840, 8850 series), Windrowers (8820, 8830, 8840, 8850 series), and New Holland CR/CX/TR Combines. This essential component ensures smooth operation and reliable power transmission within the machinery's drive systems.