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The Famous OTR. Hard To Buff marker is filled with a deep black and very strong alcohol based ink. It is instantly waterproof. The ink is also fade proof. It’s drippy, dirty, and really hard to buff. The Hard to Buff marker features a great pump action system. Easily refillable with OTR Hard To Buff Ink, and has a replaceable 15mm nib. This marker is only made in black.

Hard To Buff
•Instantly Water Proof
•Long Lasting
•Pump system makes ink flow like crazy