Our PSI™ brand creates three to five times the number of impressions of a traditional self-inker. While you may be constantly replacing pads for "the other brand", our PSI™ just keeps going and going. No replacement pads are ever required, thus you eliminate wasteful plastic, foam and ink ending up in landfills. Our patented "Z" concept makes re-inking very simple and fast. After adding a dose, your stamp is ready in 30 minutes. Re-ink indefinitely, thus creating hundreds of thousands of impressions. If your message changes, you can order the printing portion "only" and keep the rest of the stamp. Upon receipt of the new printing plate, you slide the old plate out and slide the new one in. This is better than recycling because you are re-using the original stamp... and saving postage and packaging to get the new stamp to you (our PSI™ stamps are made from 50% post consumer recycled plastic).