3/16" outside diameter measurement. Clear, rigid PVC tubing with thin walls in 36" lengths. Used as replacement airline tubes or to fabricate custom setups for aquariums and pools.
Total Air aeration kit contains 9 ft. of airline tubing, 2 valves, "T" connector, and an air stone. Once an aquarium air pump is purchased for the aeration kit a proper air supply is ready to be installed into your home aquarium.
UK Version