The Solid Valve Starter set is for use with either the Volcano Classic or Digital models. The Solid valve is the original balloon filling valve system from Storz & Bickel. The user chooses their own size of balloon, cutting individual balloons from a 10ft strip of balloon material. While this does take some extra setup time, the Solid Valve includes a special Balloon Clip that seals in vapors, and allows the user to use any balloon material they choose. This kit includes everything you need to start vaporization with your volcano, including 10ft of balloon material, solid valve filling chamber, chamber insert, extra screens, liquid pads, and a cleaning brush.