Product Category: Fine line fountain pen. Material and color: Made of stainless steel, there are 5 colors to choose for now: Black, blue, rose gold, purple and pink. Sizes: As shown in the pictures above, but it was measured by hand, so could have some very tiny errors in the data. Features: Classic style, high quality material makes it long time using. Advanced liquid ink system and unique nib guarantee smooth writingo of use: 1, Take out the pen cap, and twist out the nib part. 2, Get the Ink container and fill ink. 3, Follow the above steps to assemble the pen in reverse. REMINDER: Can not set the pen close to the fire source, the child could use the pen under the supervision of the parents.