Gel Xtreme Metallic Pens Open Stock-Metallic Gold. YASUTOMO-Gel Xtreme Metallic Pens. These pens feature high quality; water based; acid free and non-toxic pigment gel ink. Great on light or dark papers. This package contains twelve 0.7mm tipped pens. Available in a variety of colors: each sold separately. Imported. Meets CPSIA (Consumer Product Safety Improvement Act) Standards.