High-Quality Formula: Our oil-based ink is specially crafted to permanently conceal sensitive information. Made from safe, non-toxic materials, this set is an essential tool for safeguarding your personal data at home or in the office. User-Friendly Design: Simply snip the tip of each ink cartridge and align it with the refill port on your stamp roller. The process is mess-free and effortless, ensuring a seamless experience every time. Versatile Protection: Ideal for covering addresses, financial details, and other confidential information on documents like bills, bank statements, postcards, and envelopes. Keep your privacy intact with just one stroke! Broad Compatibility: Compatible with all sizes of identity protection roller stamps that feature a refill hole. Whether large or small, our ink refills ensure your stamp remains functional and secure. Comprehensive Package: Includes 21 black ink refills, giving you ample supply to keep your stamp ready whenever you need it. Protect your personal data without compromise.