EasyPro AS950 Glass Alumina Air Stone has 1/2" npt - 9" Long

Alumina Air Stones Feature:

• "Alumina" air stones - three times stronger than white silica air stones! Produces a finer bubble with no increase in pressure.
• Inlet fittings are set into the body of the diffuser, making them much less likely to break or twist loose.
• Higher density means self weighting.
• Cleanable with muriatic acid or chlorine.
• More resistant to ozone.
• Creates finer bubbles for increased aeration efficiency with no increase in pressure.