Amazon.com : Artline 5109A Big Nib Magnum Whiteboard Markers | Extra Thick 10.0mm Flat Tip | Writing is Readable from a Great Distance | Dry Erase | Low Odor | Pack of 6 | Black : Office Products
Amazon.com : Aluminum Barrel Permanent Markers | 7.5-12.0mm Chisel Tip | Blue | Visible From Great Distances | Big Nib | Magnum : Office Products
Amazon.com : Artline 5109A Big Nib Magnum Whiteboard Markers | Extra Thick 10.0mm Flat Tip | Writing is Readable from a Great Distance | Dry Erase | Low Odor | 4-Pack: Black,