These ultra-fine pore diffusers are ideal for pure gas applications (oxygen, carbon dioxide), high-density hauling, holding/grow-out tanks and emergency aeration. Choose from aluminum or nylon/glass composite (plastic) base. Aluminum models are best for long-term, heavy-duty use. Plastic models are tested at -20ºC to ensure performance and integrity. They also give you the convenience of two 1/4" barb positions to choose from, and their preinstalled check valve prevents damage. Dual barb position feature only available with plastic base diffusers. Model Type Diffusing Area CFM DYPFP4 Plastic Base 4" x 2.5" 0.04 DYPFP8 Plastic Base 8" x 2.5" 0.08 DYPFP12 Plastic Base 12" x 2.5" 0.13 DYPFP24 Plastic Base 24" x 2.5" 0.25 DYFP12 Aluminum Base 12" x 2.5" 0.13 DYFP16 Aluminum Base 16" x 2.5" 0.18 DYFP24 Aluminum Base 24" x 2.5" 0.25
