Amazon.com : Edding 300 Permanent Marker Pen – 1.5 – 3mm Bullet Tip – Black – Pack of 6 : Office Products
Amazon.com : Sharpie 30002 Fine Point Permanent Marker (Pack of 6), Marks On Paper and Plastic, Resist Fading and Water, AP Certified, Red Color, 12 Markers Per Box, Pack of 6 Box,