✓?AFTER-SALES SERVICE?If you have any questions after purchg our D10 quick-drying ink cartridges, you can contact us at any time, and we will do our best to provide you with the best customer service. ✓?WIDE APPLICATION?Ink cartridges are suitable for printing on absorbent and non-absorbent materials, including wood, acrylic, aluminum, porcelain, cloth, paper, plastic, metal, fabric, glass, labels, leather, etc. (It takes 3-5 seconds to dry). ✓?LAGER CAPACITY?The ink capacity is 42ML, the height is adjustable from 2-12.7mm, and the length is not limited. When you need to suspend printing, please close the protective cover in time to prevent the ink cartridges from drying out and blocking the print head. If it is clogged, please wipe the nozzle with a soft tissue . ✓?QUICK-DRYING INK CARTRIDGES?Our handheld printer ink cartridges print smoothly, without ink clogging, print clearly, and have strong adhesion. The ink capacity is 42ML, the height is adjustable from 2-12.7mm, and the length is not limited. It can print more than 100,000 characters and is durable.