1 brass 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. use scope: leather marking. For brass tube: medium box: 12pcs per dozen, 10dozens in one medium box, 36 medium boxes in one outer case. For plastic tube: medium box: 100pcs per bag, 10 bags in one medium box, 80 medium boxes in one outer case.
