Wetscott tip disposable needle is used for microhistological biopsies where, together with the cytological aspiration biopsy, helps an histological sampling for a more precise diagnosis. On the distal part, a cutting side enables the tissue sampling in a controlled and non traumatic way. The needle cannula is centimeter marked in order to make the procedure as precise as possible. An echogenic marker is placed on the distal part of the cannula. By using an ultrasonic machine, the marker enables the needle to be constantly seen during the whole procedure. A color code is meant to help the user to identify the device diameter; this code is recognized on international level.