This 4 inch Universal Flexible Corrugated Pipe Connector from Cleveland Tubing is ideal for easily connecting two pipes together. This connector fits over 3" pipe and inside 4" pipe. Connects tightly and securely with a simple snap. This coupler adapts to fit 3 inch or 4 inch corrugated pipe, 4 inch PVC pipe and many other 4 inch pipe varieties. Inner Diameter to Inner Diameter (ID to ID) or Inner Diameter to Outer Diameter (ID to OF) connector.