1. DreamCatcher Arts Gel Pens Set Includes 48 Unique, Ultra Fine Tip Coloring Markers. Great for Adult Coloring Books, Journaling, and Scrapbooking (Click Link to Check Price on Amazon)
Editor's Rating : 9.7 out of 10
EASILY STAY IN THE LINES with DreamCatcher Arts' unique, fine-tipped gel pens. Unlike rollerball-type pens, our pens will provide a smooth flow of ink, creating the perfect coloring experience for you, your kids or anyone you gift this great set to.48 UNIQUE COLORS AND GEM CAPS, including 12 glitter, 12 neon, 12 metallic, and 12 pastel fine tip markers. Many shades of all the primary colors so you'll have a full assortment of pens for every occasion. Each pen is also capped with a beautiful gemstone.

2. Huhuhero Art Soft Brush Pen Markers Supplies for Adult Coloring Books Dual Tip Premium Colored Watercolor Pens for Kid Drawing Sketch Painting (24 PACK, No Duplicates!) (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
THE ORIGINAL SET OF UNIQUE 24 MARKERS! Premium offer of 24 liquid maker pens! Perfect for everyday use and decoration or gifts for upcoming holidays.DUAL TIP DESIGN: 0.8 mm fine tip for outlining and detail, 1 - 2 mm brush tip for shading and coloring

3. Super Markers Set with 100 Unique Marker Colors - Universal Bullet Point Tips for Fine and Bullet Lines - Bold Vibrant Colors - Includes a Marker Storage Rack - 100% Satisfaction Guarantee (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
ULTIMATE SET OF 100 UNIQUE MARKER COLORS: A full rainbow of 100 unique eye-catching colors at your disposal. Premium quality markers with incredible vibrant and bold colors that feature a specialized bullet point tip that allows them to be used for both fine detailed lines and bold thick linesFUN, SAFE and EASY TO USE: Super Markers are completely kid safe as they are non-toxic, water-based, acid-free and conform to ASTM D4236 and EN71. Children, adults, art students and teachers love our super markers because they are fun, easy to use and provide great visual results

4. 40 Art Gel Pens set for Adult Coloring Books In Storage Case Quality Markers In Glitter Neon Metallic Pastel Color (Click Link to Check Price on Amazon)
Editor's Rating : 8.9 out of 10
PREMIUM QUALITY: Smooth ink flow durable tips and long lasting ink. Colored pens that don't bleed or smear. Best gel pens for adult coloring books drawing sketching zentangle kit mandala grayscale bullet journaling scrapbooking doodling school projects or color by numberGORGEOUS COLORS: 40 vibrant artist colours including primary and secondary. Including Glitter pens set metallic pens set neon pens set gold silver white black and many more

5. Lineon 108 Colors Gel Pens,Gel Pen Set for Adult Coloring Books Art Markers (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
Lineon gel pens with 108 unique colors, are ideal for adult coloring books.Long lasting and durable tips also provide smooth writing for coloring, doodling and drawing. Non-toxic, acid free.