Umarex T4E TM-4 CO2 .43 Caliber Blue Black Training Rifle Paintball Marker 723364921056 | eBay
12.7mm Reflective Markers – B&L Engineering
Amazon.com : NiArt 12-Color Dual Tip DOT Markers - Round DOT, Fine and Fiber-Tip for Art, Coloring, Journaling, Hand Lettering, Sketching, Anime and Illustrating - Double-Ended, Workable from 0.5-3mm : Arts, Crafts