Overview Reviews Product Description STAEDTLER ball 4320 M Triangular ballpoint pen Contains 10 ballpoint pens in assorted office colours, line width M Ergonomic triangular shape Particularly smooth writing performance ~1.0 mm ball diameter for a medium line width Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Staedtler Staedtler 4320 bpt pen med 10pkoff Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments