Micro-Pore Air Diffusers SINGLE MICRO PORE DIFFUSER Glass materials will not react with nutrients solutions Micro-Pore design produces smaller more prolific bubbles Will not clog or break down like other compressed silicates diffusers Extends the life of nutrient solutions for all types of hydroponics Use with 3/8 inch ID tubing  | Manufacturer's Product Information |  | | | 2007 MSRP Each $ | 20.95 | | Case Weight | 0.31 LB | | Case Dimensions | 6.5 x 2.25 x 2.25 IN | | Case Quantity | 1 | | |