correction pen is content: 7ml and 13cm length.
Correction pen is an alternative to correction fluid used to correct mistakes during typing,
or, in some forms, handwriting. One side of the pen, which is placed against the error,
is coated in a white, opaque masking material. Pressure applied to the other side of the pen transfers
this material to the paper.
It is sold as short pieces of pen, or as long rolls to be used in typewriters,
which apply sudden pressure when a key is struck, and can therefore apply the masking material
in exactly the same shape and position as the erroneous character.