This is a composite writing instrument made of maple material that feels warm and gentle on the handle. It can be used with a black and red permanent ballpoint pen and 0.5mm mechanical pencil. Because it is a natural material, the wood grain may vary from one piece to another. 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