The Sea-Dog Rectangular Motor Flush is a maintenance tool for running fresh water through an outboard lower-unit cooling system. Its rectangular cups are intended for larger outboards and connect to a garden hose without tools. Product type: Rectangular outboard motor flush Materials: Molded PVC and painted steel Use: Flushes salt, sand, minerals, and contaminants from the lower-unit cooling system Connection: Attaches to a standard garden hose Tools required: No tools required Cup style: Rectangular cups for larger outboards Maintenance uses: Winterizing, tune-ups, and other service that requires running an outboard engine out of the water Warning: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to P65Warnings.ca.gov.