The Graf Quattro twist downspout filter cleans out leaves and debris with an internal sieve with a high water yield (approximately 90-Percent). Works with both square and oval gutters. Includes hose and screw connection. Recommended for roof surfaces up to 875 square foot. Shut-off valve for winter diverts water into downspout. High flow 1-inch side outlet. 8-1/4-inch wide by 9-1/2-inch high. Grey.