Our double-ended gram wart pen set contains polypropylene. It can easily remove warts, moles, and skin tags from the face and body. Its use is very simple: 1. Use wet wipes to clean skin growths and surrounding skin, choose a suitable wart removal tip and install it on the wart removal pen. 2. Place the rubber band on the tip of the pen and slide it up. 3. Remove the nib and place the hollow end on the skin label. 4. Once it fits the skin, press the button to move the band skin tab so that the band tightens around the bottom skin tab. 5. Wait for the skin label to fall off naturally. And with this set, you can easily remove skin tags from your skin and make your skin smooth and clean.