Matala Air Diffuser TubingPlease Note: This is not self weighted tubing. A simple, effective, reliable and economic way to aerate your aquaculture farms. It is made form high efficiency rubber with special designed pore size and its numerous pore distribution to create maximum fine bubbles which slowly release in the water. The air flow is 0. 45 1. 1 cfm ft (0. 3 1 lpm cm). Durable with low start up, maintenance and replacement cost Inside diameter: 1 2 inch