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These diffusers have a molded rubber support on each end that protects the diffuser from abrasives.Fit both 1/4" and 1/2" tubing. Extremely durable and washable (reusable) air diffusing media. Manufactured with brown Adamantine Spar (corundum/alumina) under ultra high tempeature and pressure. Applicable in Acidic or Alkaline waters (low or high pH) Suitable for aquarium, koi pond, fish hatchery and aquaculture applications. Diffuser Diameter: 1.2" Available Sizes: 4", 6", 8", 10", 12".
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