Covidien (fka Kendall) Dover - 18" Clear Urinary Extension Tubing And Connector is for use with all external devices and leg bags. Kendall's extension tubing has an internal diameter of 0.335" and features a hard plastic barbed (graduated) connector for easily connecting to any external urinary device. 18” clear tubing. Formerly Kendall Uri-Drain - 18" Clear Urinary Extension Tubing And Connector. Connector style: Graduated. Each, Box of 24.