The Cinch Ace Connector Kit includes two tight 90° elbow connectors, three pieces of dryer vent tape and one 4 in. dia. by 8 ft. long aluminum flexible hose. The 90-elbow is designed with an oval connection to save space in your laundry room. No hose clamps required with dryer vent tape which makes it a quick and easy installation. Pre-assemble the hose to the 90-elbows with the dryer vent tape and push 90-elbow connector onto duct for a quick, air tight and easy install. If dryer is not against a wall use the extra piece of dryer vent tape to secure 90-onto dryer vent. For regular dryer vent cleaning maintenance, simply pull the connector off the dryer vent duct for access and push back on when complete. Designed for all 4 in. round dryer vent duct.