Diamond Glass Microscope RigIf you're getting a small rig, you want to maximize its filtration potential and that's exactly what Diamond Glass achieved with its Microscope Oil Rig. Standing only 6 inches tall, this small yet cleverly designed piece features a unique "microscope" recycler shape which returns excess water to the pipe and acts as a splash guard. It also allows the smoke to diffuse before it reaches the angled mouthpiece, to ensure powerful but smooth and flavor