Roosebeck Uilleann 3 Drone Reed Set with Carbon Fiber. A set of 3 Uilleann pipe drone reeds made from aluminum with carbon fiber tongues, which include 1 each; bass, baritone, and tenor. The shortest reed is 2.25" in length with an OD on the metal tube being .175 and with the hemp .23". The middle reed is 3.46" with an OD of .215 for the metal tube and .26 with the hemp. The longest reed has a length of 4.13" with an OD of .244 for the metal tube and with the hemp .325".