Cobra-Connector will increase your vacuum power by the acceleration of the airflow through a 3' Tapered Flexible Connector. it will minimize the air turbulence and increase airflow velocity, as the connector diameter changes from a 2" to a 1 12" inside diameter. Cobra-Connector offers other features:3' High Quality Spiral-wound smoothbore hose2" Swivel Cuff to prevent tangling on one end1 12" Threaded Connector on the other endClog-free attribute The Cobra-Connector's special features make it durable, easy to handle and give this Connector the characteristics of a desirable work-partner.