When the ink runs out

Red or Black ink

Clutch: internal three-jaw brass clamp

comes with magnets for easy coupling

Like most other On The Run pens

on the run otr 003 hard to buff squeeze marker 18 mm Mere When the ink runs outThe OTR. 003 Hard To Buff is a heavy duty squeezer loaded with ultra permanent ink, built for bold marks with that classic squeeze marker flow. This one hits with deep black coverage and a smooth, juicy output. The 18 mm nib gives you wide strokes, fat drips, and big letter movement when you want your lines to really stand out. Inside youve got the legendary OTR. 970 Hard To Buff ink known for sticking, staining, and holding solid on pretty much