The Soul Tip mops are high-performance squeeze markers. The almost 1" round nib has texture like the soft side of Velcro. This makes the marker write smooth on most surfaces. The nib on the Soul Tip is one of the most durable we carry. This marker ships empty, so just fill it with your favorite ink and it's ready to use. For best results, fill this marker with OTR ink, Molotow Cocktail Ink, Molotow One 4 All ink, Do Em Dirty Ink, Or Smash Ink. This Marker is REFILLABLE and the nib is replaceable.