Looking for the ultimate set of black pens? This set of 16 black ink fineliner and brush pens was designed to be just that. The nibs vary between needle, chisel, bullet and brush so you can create without limitations. Those looking to dabble with water-based media can take comfort knowing that the pens use Japanese water-based pigment ink for waterproof and fade-proof lines. Conforms to ASTM D 4236. PRODUCT DETAILS 2 YEAR WARRANTY 30 DAY RETURNS FAQ VEGAN FRIENDLY This set includes 16 pens with black water and fade-proof ink. Sizes included: needle tip in 005, 01, 02, 03, 05, 06, 08, and 10; chisel tip in 1mm, 2mm and 3mm; bullet tip in XS, S, M, and L; and BR (brush). Nibs are made in Japan. We offer a two-year limited warranty, beginning at the time of purchase on all Etchr products sold. We warrant our products to be free from manufacturing defects in materials, workmanship, and failure or breakage of parts/full products that render them non-functional. We offer a 30-day money back guarantee from the original date of purchase. The customer is responsible for return shipping costs. All Etchr products are covered by a 24 month manufacturing warranty. Can I use watercolours over this ink? Yes, you can! These pens use waterproof ink, so you can use them with any water-based paints! What are the sizes of the needle nibs? 005: nib size 0.4mm; line size 0.23mm 01: nib size 0.58mm; line size 0.25mm 02: nib size 0.68mm; line size 0.28mm 03: nib size 0.78mm; line size 0.38mm 05: nib size 1.0mm; line size 0.48mm 06: nib size 1.17mm; line size 0.50mm 08: nib size 1.30mm; line size 0.52mm 10: nib size 1.55mm; line size 0.9/1mm All components in this set are vegan friendly.