Note: This is not a medical device. Use only in accordance with applicable research guidelines. NEW Reusable Magic Pep Pens 3 pack 🌟 🐸 📝 NEW Reusable Pep Pens 4 pack. Reusable Magic Pen Peptides Pen Set. You will receive 1Green, 1 Turquoise, 1 Chrome Turquoise 🐸 This is a Peptide Reusable Pep Pen for your research needs. It alleviates having to draw and use syringes daily or weekly. Fits the standard 3ML Cartridge that can be used for researching insulin or other peptides. ⚠️ SELLER MAY SUBSTITUTE A DIFFERENT COLOR THAN WHAT IS PICTURED IN THE EVENT OF BEING OUT OF STOCK.