Our pet teeth whitening pen set is carefully formulated with silica, hydroxyethyl cellulose and sodium phytate. Designed specifically for effectively softening tartar. The usage method is extremely convenient: 1. Rotate the toothbrush to draw out the oil on the surface of the teeth; 2. Clean your pet's teeth with a teeth whitening pen. Three minutes later, use a tool to slowly scrape off the dirt on the pet's teeth. 3. Reapply with a dental restoration pen to protect the surface of your pet's teeth. Teeth whitening pens and teeth restoration pens offer comprehensive solutions for pet teeth care.