This brass pen is machined by pure copper precision machine, hand polished and polished, and the surface may have some traces of friction! But it is very solid and durable. It works! This is a pen that will give you a very comfortable feeling! The end of the pen has a venting hole, the water is flowing smoothly, and the pen body is connected to the tight and error-free layer. Material: brass Length: 138mm (without clip) Weight: 43g Note: The pen already contains a refill and a velvet bag, which can be used when received! Handmade brass, carefully polished. The surface is free of any plating and the like, retaining the original texture of the brass. Due to the characteristics of copper, with the use of time, it will gradually oxidize on its surface to form a unique retro charm, which is worth playing.