Dual-tip Pen ( fineliner tip + soft brush tip ) -160mm long *11mm (big cap dia) * 8.8mm (small cap dia), 0.4mm Nylon material fineliner tip, Soft felt tip size 3.5mm(D1)*19mm(L1)- 4.2mm(D2)*35mm(L2), each pen ink content is 1.5g,shelf-life 2 years at least, writing length 230 - 300m.