Staedtler Stick 430 ball pen. Sturdy ballpoint pen with ventilated lid and extra long desk mat. Length of approx. 2500 metres. Regulated ink flow prevents blobbing and scratching. Medium Colour: Blue. The Staedtler Stick ballpoint pen has been specially designed for everyday use in homes, schools and offices. It features a sturdy stainless steel nib provides a medium 0.35mm line width for bold and clear blue lines when writing. It features a cut cap and clip along with a comfortable hexagonal barrel for writing comfort. This pen is perfect for travelling with automatic pressure equalisation to prevent ink leakage when you are on a plane. These blue writing instruments come in a bulk pack of 10.