Sure Flow 1600 Kit Includes: 1-Shroud with built in anti-vortex shield 1-Full rotation bracket 1-Medium flow propeller (black) 1600 GPH 1-High flow propeller (white Dumas 3004) for MJ 1200 only 2000+GPH 1-Adapter bracket to attach original MJ brackets to full rotation bracket 1-Stainless Steel shaft with impeller magnet and end caps Benefits of the Sure Flow 1600: Excellent water movement for reef tanks Works with Sure Grip magnet holders Works with original Maxij-Jet Brackets Fish love the extra water movement Fully adjustable flow direction Nice, wide gentle water flow No more dead spots Very cost effective Aprroximate gallons per hour: Maxi-Jet 400 1300 GPH Maxi-Jet 600 1400 GPH Maxi-Jet 900 1600 GPH Maxi-Jet 1200 1600 GPH Maxi-Jet 1200 2100 GPH (Large Propeller) Pump and Sure Grip not included. Works with Maxi-Jet 400, 600, 900 & 1200. Produces 1600gph