We supply only top quality ink and master roll. offering 100% gurrantee to our dealers. Because of pretty good quality, our present dealers are very satisfied to our products to make them to be one of the most important suppliers in their markets.and increase their sales more and more.as our quality is same as original, we use the right way to make ink and master and we are the only factoty to use purified water to make ink.We have all series ink, master roll and spare parts for riso,ricoh, Gestetener, Duplo>Our master roll products features as follows: 1. printing definition very good 2. printing quantity is more than 2000pcs. 3. quality is very stable. Also we can offer good quality copier toner, and laser printer toner cartridges We have R& D team, our PH doctors are working seriously .