Rollerball pen with replaceable European size Topball 850 refill, line width approx. 0.5 mm. Writing colour black. The conical tip made from wear-resistant stainless steel is ideally suited for comfortable and striking writing. The cap-off ink does not run dry even if the cap is removed for 2–3 days. The Topball 811 can be refilled with European size ink refills.