Fitting 510 thread batteries, the Metal/Glass Wick Cartridge from The Kind Pen is a great choice for holding and vaping concentrates. The metal structure and glass tubing makes this cartridge one of the sturdiest on the market. The dual seal design keeps the tank from leaking. The Metal/Glass Wick Cartridge holds .5ml and has a low resistance of 1.8ohms.
This piece features sleek and clean clear glass that allows you to watch this concentrate rig or water pipe function. The clear glass allows you to watch the bubbles stack as your smoke/vapor percolates