Description: 
Steel Brushes for charts, large lettering and illustrations, are made of 7 thin, layered, elastic steel plates that yield slightly to pressure.
Small gaps between the steel plates hold a sufficient amount of ink.
The spring must be washed thoroughly after writing or as be cleaned with an old toothbrush (the plates are stainless steel).
Each Speedball Steel Brush is individually packed in a deluxe plastic case.
For use with a Speedball penholder.