ASM - G-4XXS Protein Skimmer ASM Sale! from 54300 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Specifications: Body Size: 8 1/2 Height: 30 Footprint: 12x12 Pump: PSK1200 Pump Outlet Size: 1 w/ Union Tank Size: 450 gal