This listing includes 50 units of plate guide deve components, part numbers JC72-00984A and JC72-00985A.These parts are compatible with ML series printers including models 1510, 1520, 1710, 1750, 1910, 1915, 2525, 2580, 2850, 2851, 3050, and 3310.The items function as replacement guides to restore equipment performance.