Leather marker pen is using for leather / shoe marking, it can write fluently on the surface of the leather. 1) brass/nickle tube or plastic tube 2) silver refill pens are especially used for leather marking 3) the line is obviously seen on dark leather material 4) environmental protection, not any poison, ink is nontoxic. 5) we have multi-design. Packing:12pcs/small box, 10small boxes/big box, 36big boxes/carton G.W:9kg/carton