Lighthouse Matrix Self Adhesive 2x2 cardboard coin holders protect your coins from direct handling. No stapling required! Just pull away the paper exposing the adhesive, insert a coin and close to seal. The clear liners are free of chemical softeners for optimal protection and allow visibility to both sides of your coins. The outer white cardboard frame is writable for better identification and have a hermetic catch. Sold in packs of 25 pieces