Sharpie® Permanent Marker, Fine Point, Black, DZ - WB Mason
8 Pens/Box American Sanford Sharpie Whiteboard Marker Set Flipchart Mark Hanging Paperboard Special Pen Round Head 22480|Whiteboard Marker| - AliExpress
Sharpie 12-Pack Fine Point Black Permanent Marker in the Writing Utensils department at Lowes.com