Cobra 3 in. D Rubber Drain Bladder

The medium drain bladder clears 1-1/2 3 in. drains by expanding in the drain and forcing water pressure through the clog. The bladder is designed for use with garden hoses. Brand Name: Cobra Diameter: 3 in. Material: Rubber Product Type: Drain Bladder Connection Type: Threaded Number of Pieces: 1 pc Color: Black For Use with Minimum Pipe Size: 1-1/2 in. For Use with Maximum Pipe Size: 3 in.