Micro-Pore Air Diffusers MICRO-PORE XL AIR 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 $ 26.95 Case Weight 0.54 LB Case Dimensions 10.5 x 2.25 x 2.25 IN Case Quantity 1