Model Compatibility: Fits ADS-2200, ADS-2700W, ADS-3100, ADS-3300W, ADS-4100, ADS-4300, ADS-4500W, ADS-4700W, and PRK-A3001 scanners and printers. Function: Replacement pickup brake separation roller for use in the listed scanner and printer models. Quantity: Includes five identical pickup brake separation rollers per set. Part Identification: Identified as PRK-A3001 in the title, matching the specified part number for the listed devices. Application Scope: Designed for restoring pickup brake separation functionality in the compatible models listed in the title.