The Solid Valve was the original valve for the Volcano Vaporizer from 2001/07, then Storz & Bickel created the Easy Valve to make life easier. The Solid Valve is the best as the Volcano Balloons are cheap to buy and all the parts are easily cleaned, the large balloon allows you to keep an excellent visual check on the build up of vapor. All the parts that direct the air and vapor on the Solid Valve are tasteless and food-safe. The Solid Valve set is equipped with a wide range of accessories: Spare filter, liquid pad for vaporizing liquids, a cleaning brush and additional balloon material (3m). Because the Solid Valve set comes with 3m of Volcano Balloon tube instead of ready made balloons, this means you can adjust the size of balloon to your liking. Each balloon can be used around 100 to 150 times.