PAID - ExcelMark Self-Inking Two-Color Rubber Office Stamp - Red and Blue Ink Self-inking stamp design allows for quick, repetitive stamping Red stamp mount with a clear base allows you to easily align impressions Features a double-sided, two-color (red on one side, blue on the other) ink pad that doubles the number of impressions and the useful life of the pad Thousands of impressions before re-inking is necessary Impression area: 1/2" x 1/1/2", Impression message: "PAID" with space for initials and/or date