This replacement flatbed scanner assembly (part number JC39-01699A) is compatible with select SCX series printers including SCX-3400, SCX-3400F, SCX-3401, SCX-3405, SCX-3405F, SCX-3405FW, SCX-3405W, SCX-3407, SCX-4521NS, SCX-4521HS, SCX-4321NS, and SCX-4021NS.It restores scanning functionality with a direct-fit design and supports everyday document and photo digitization needs.