Our Self Inking Stamps by ExcelMark have a two-sided ink pad that doubles the number of impressions before it’s necessary to re-ink or replace the ink pad. When one side runs out just pull the ink pad out, turn it over, and re-insert to double the life of the ink. It's like buying one self-inking stamp and getting an extra ink pad for free. This can save you up to 50% on your cost of replacement ink and pads. The makers of ExcelMark brag that their self inking stamps are the most cost effective in the market, and we agree.