This is an authentic Rephr 23 is the brush blend. It is the smallest and finest pencil brush in our collection. This ultra-fine precision with pinpoint accuracy. It is the smaller sibling to our flagship 03 pencil brush and pushes the balance between softness and precision to the absolute limit. handcrafted by master artisans in Kumano, Japan using a blend of natural and synthetic fibers. Bristle length: 5.5mm Bristle material: natural and synthetic fibers Note: Due to the cost to me, please no low ball offers. Condition: New with packaging. Brush has never been used and only taken out of the sleeve packaging for pictures for this listing. Please see photos as it is a part of the item's description.