Home Writing CONVEX. Ball pen in aluminium and ABS 🔍 CONVEX. Ball pen in aluminium and ABS Ball pen in aluminium and ABS with twist mechanism and clip. Blue ink. ø11 x 145 mm Add to quote Category: Writing Tag: Pen Related products KANT. Ball pen in aluminium (81139) EZEKIEL SET. Roller pen and ball pen set in metal (81210) HOOK MATTE. Bronze ball pen (81003) HOOK MATTE. Bronze ball pen