The Graf Quattro downspout filter cleans out leaves and debris with an internal sieve with a high water yield (approximately 90%). Works with both square and oval gutters. Includes hose and screw connection. Recommended for roof surfaces up to 538 square foot. Shut-off valve for winter diverts water into downspout. .75-inch side outlet. 4-inch long by 5.2-inch wide by 4.7-inch high. Grey.