Specially Designed For Smooth & Effortless Writing This Premium Quality Ball Pen Is A Classic. Crystal Barrel For Visible Ink Supply Whist Regulated Ink Supply Avoids Blobbing And Scratching. This Staedtler ballpen has a medium tip The ink flow on this Staedlter pen has been regulated to avoid blobbing or scratching. A ventilated cap is standard on the 430 as in accordance with ISO regulations. The pen is also very environmentally friendly. This pen is extremely comfortable and would be ideal for use in exams or for writing assignments at school or university.