The Inner Sanctum Glass Bowl is a useful piece. It's compact, and has a built in glass screen so you don't get that annoying pull through that can happen with a strong pull. Clear, so you can see the smoke moving through the piece, and a platform to facilitate pulling out of the joint. Available in 14 or 19 mm. Don’t forget to check out the rest of them the Inner Sanctum Sherlock, Glass Pipe and Chillum! Hand Made in the USA	