New wallet sets with the same standards as other Pitt Pens. Pigmented drawing ink is extremely lightfast and waterproof. Long lasting pens are convenient to use and all are pH neutral and acid free. Unique brush point ensures an even flow of ink, gliding gently and smoothly over the paper while retaining its shape even after constant use. By varying the angle you can achieve a personal touch to your script or lines - fine, medium, and broad strokes are possible, but also shading of various kinds.