The Wulf SLK Concentrate Vape Pen Kit by Wulf Mods is powerful and discreet. The slim design and quality build coupled with a user-friendly display makes this concentrate pen a top choice. The single button system starts the vaporization process and 15 seconds later the vapor that is curated is smooth and flavorful. The quartz heating mechanism and ceramic chamber provide the perfect environment for a user's favorite concentrate. The WULF SLK by Wulf Mods features three heat options, 2.8V, 3.4V, and 4V, users can truly customize their session.