Speedball broad-edged pen nibs are made from the finest steel in the USA. The triple reservoir design features 3 reservoirs for increased ink capacity and extended, smooth, uninterrupted ink flow. Crow Quill 102 is superfine and flexible. Hawk Quill 107 has a superfine point that is very durable and great for long, even lines and cross-hatching detail. Fits into a Speedball Type A penholder.