Euro-Reef RS8-2 Protein Skimmer, 155 gal. capacity, 24 inch H by 11 inch by 13-1/2 inch. 8 inch diameter. SEDRA 5000 pump included. Special features: Foam sponge helps reduce residual air bubbles. Easily adjustable riser pipe allows for accurate control of dry or wet foam production. Extra large collection cup eliminates the need for a drain. True union fitting for easy cup removal. No additional space above skimmer is required in order to remove the cup. The super quiet SEDRA pump is water cooled for maximum efficiency and its compact design allows for a seamless integration into the skimming system.