ASM in-sump skimmers are constructed of extruded PVC tubing and injection molded plastic. ASM protein Skimmers use needle wheel design on a Sedra pump for to create a finer bubble for highly effective skimming action! Easy to use! Just set it in the sump, plug it in and adjust the outlet tube! ASM G 1X Protein Skimmer Specifications: - Gallon Rating: up to 150 gal. - Pump: 1 x Sedra 3500 - Reaction Chamber Diameter: 5.5" - Footpring: 8.5" x 11" - Height: 22.5"