Check the listing for details. T-H Marine Flow-Max Ball Scupper - Clear. Condition: New. Listed at 18.72 USD. Flow-Max&trade Ball Scupper - Clear Replace your old worn-out flapper scupper with our new Flow-Max&trade positive sealing ball scupper. A larger exit hole allows 70% more water drainage than its nearest competitor. Multiple mounting holes make retrofits quick and easy - no filling holes or re-drilling. A neutral buoyancy ball ensures the ball won't float up and break the seal. Meets all ABYC standards. The easy twist-off design makes cleaning debris a snap. Simply twist counterclockwise to remove the ball cavity, clean out and twist back on. Stainless steel security pin provided for added safety. Features:Replaces worn out flapper scuppers70% more drainage than competitive modelsTwist off for easy cleaningRetrofits all hole patternsThe seal is slotted to fit over 1-1/4" motor well tubes3&rdquo Diameter x 2-1/2&rdquo H The Flow Max Scupper only comes with one screw. The screws that screw it to the boat do not come with it. &nbspThey will be different for every boat depending on the hull thickness but you will need a flat head screw. &nbspScrew included is a #4 x 1/4" Phillips Pan Head Stainless Steel Screw. Track Page Views WithAuctiva's FREE Counter