This is a set of Gercio D12 mandrel and tubes. The tubes are 46mm. All items are used, so please purchase only if you understand this. Tubes: All four have been used to make reeds 3 or 4 times. Mandrel: There is discoloration due to heat treatment. Some dirt from use and storage can also be seen. These will be delivered as is. #Oboe #oboe #OboeReeds #Gercio #Geltio #Mandrel #Tubes