... wearable acrylic tip 2.aluminium barrel 3.Oil based opaque ink ,lightresistant ,waterproof . Paint marker used in industry writing ... width 2~~3mmink weight 7 gwriting distance 300mpackage :12/144/864Acrylic wearable tip .Oil ... based opaque ink ,lightresistant ,waterproof ,dry fast ,low odour ,confirm to safety ...