CCell Silo Auto Draw Cartridge Vaporizer Oil cartridge use is increasing in your area, and this is the newest must have. The CCell concealed cartridge auto-draw vaporizer offers a sleek, minimalistic design at an extremely affordable price point. The Silo features an adaptive optimum temperature setting for users to enjoy their favorite concentrates without worry. The Silo comes with two 510 threaded magnetic adapters that allows the user to quickly change between CCell Cartridges.The CCELL Silo Concentrate Vaporizer is perfect for those using CCELL based atomizers.