Cad Lights PLS-150 Pipeless Protein Skimmer for Aquariums, 160-Gallon A patent pending Pipeless design; professional air injection; bubble plate; pin-wheel impeller and a locking system to hold the skimmer level settings Compact and space-saving with a small foot print of just 7" x 7" Quiet operation Easy to clean and maintenance Winner of Reef Builder editor's choice Dimension: 7" x 7"x 225"