Keep your DYMO label printing operations running smoothly with this essential replacement spool assembly. This versatile component includes a label holder that's perfectly compatible with multiple generations of Compatible with DYMO LabelWriter printers, including the 550, 450, 400, and 300 series (NOT for 4XL or 5XL Model). The robust construction ensures reliable performance, while the curved arrow indicator helps with proper label orientation. The spool holds labels in place providing consistent label feeding, preventing jams and misalignments during printing. This replacement part is designed to meet the exact specifications of your Compatible with DYMO printer, making installation straightforward and hassle-free. Whether you're replacing a worn spool or keeping a spare on hand, this assembly helps maintain the professional quality output you expect from your label printer. Ideal for business environments where consistent, uninterrupted label printing is essential.