Classix P16 Self Inking Stamp 1-1/2" Diameter impression area. Self Inking custom stamps are convenient for all office and personal uses. The ergonomic handle is designed for durability and comfort. Stamps make approximately 5,000 - 7,000 impressions before needing to be re-inked. The stamp pad is refillable and replaceable. Use ClassiX Refill Ink only to re-ink your stamp pad. Use of any other ink can damage the stamp pad, the stamp and void out any warranty.