Upgraded Colorful Teacher Stamp: The material upgrade stamp, in the case of continuous stamping, the imprint is still clear and not deformed. Unlike traditional stamp materials, after a period of time, the teacher stamps will be dried out and cannot be used. After the upgraded stamp is covered with the protective cover, the stamp ink will not evaporate easily, and it can be used more than 30,000 times under normal use. High-quality Sturdy Material: The plastic material of the stamp body is upgraded. Compared with the previous transparent plastic, the thickness of the plastic used now is upgraded to be stronger. Will not break during use.This is a high-quality stamp set using high-quality oil-based ink, which is safe for children and students, and can be used at school with confidence. Self-Inking Stamp Set: This pre-inked teacher stamp is very easy to use. The stamp can be refilled by itself without other accessories. It can be used more than 30,000 times, which is enough to meet your daily needs. After the stamp is covered, it dries, and the pattern is formed.The stamp has good tightness and will not miss the bottom of the paper under normal use. Convenient to Carry & Motivate Students: The teacher stamp set has a large storage box. Each stamp has a separate cover to prevent the stamps from drying out. Small and portable, you can put it in your pocket or in your commuter bag. The self-inking stamps are rich in colors, which can encourage students and stimulate the vitality of children. Wide Application & Tips: Students of all ages will love this colorful encouragement stamp. It is also a perfect gift for teachers. Parents can also use this self-inking stamp when tutoring their children. 8 different colors and patterns meet your various daily needs. Pay attention; when the stamp is used evenly, the pattern will be more clear and complete.