NorthStar Semi-Trash Pump - 4in. Ports, 23,040 GPH, 3/4in. Solids Capacity, 270cc Honda GX270 Engine Long-life silicon carbide mechanical seal resists corrosion, wear and heat better than a standard seal Multi-directional discharge 23-ft. max. suction lift Cast iron impeller and volute last longer for semi-trash operations Silicon carbide seals are 2 times harder, 15% tougher, and 50% stronger than common aluminum oxide seals