Cad Lights PLS-50 Pipeless Protein Skimmer for Aquariums, 50-Gallon A patent pending Pipeless design; professional air injection; bubble plate; pin-wheel impeller and a locking system to hold the skimmer level settings Reef Builder rated CAD Lights PLS-50 is a Perfect Pipeless NANO Protein Skimmer Space Saving Tiny footprint of just 325" Inch Dimensions: 35" x 325" x 15" Only 3-piece assembly making it easy to disassemble and clean for maintenance