Specification: Type: nib marker pen Size: 13.5cm x 1.2cm Lead diameter: 0.7-1mm Ink color: black, blue, red, and green Long nose: 20mm/0.786inch Feature: Suitable for home decoration and hardware processing Deep holes for marking in automobile manufacturing and other industrial production Write on aluminum, metal plate, concrete, stone, iron, steel, glass, wood, plastic, etc. waterproof, antifouling and Quick dry Extra long, thin round head Package Included: ① 8x black ② 2 each in black, blue, red, and green