Single 9" Rubber Membrane Diffuser with Self-Sinking Base Accessories Covers all pistons

Covers all pistons

Ideal for deterring seagulls and other birds

Turns at a rate of 5-6 times per minute

: 8' x 20' (qty 4 dock tops

Single 9" Rubber Membrane Diffuser with Self-Sinking Base Accessories Covers all pistonsSINGLE 9" DISC RUBBER MEMBRANE DIFFUSER WITH SELF SINKING BASE Designed to sink without adding rock or sand to the diffuser base Heavy gauge metal with a textured powder coat finish. Low psi self cleaning diffuser Rope holes to allow easy setting of each diffuser Backflow valve to prevent water entering the airline You can also add our optional riser tubes to elevate your rubber membranes if you have a lot of mud and muck on the bottom of your pond or