Wood body composite writing instruments increase the taste of the time you use it. The warmth and wood grain pattern of the wood will soothe your hands and eyes. It can be used with a black and red permanent ballpoint pen and 0.5mm mechanical pencil. Ballpoint Pen Refill: BRF-8F-B / R (Black, Red) Product Size: Total length 5.2 inches (133 mm), Shaft diameter 0.5 inches (12.3 mm). Weight: 28.4g