Montana Cans BOLD Markers feature alcohol-based, ultra-black ink that is waterproof and UV-resistant. The refillable barrels are made of premium aluminum for a durable marker that feels great in the hand. This marker comes in a sturdy built-to-last aluminum body that is refillable and the felt tip is replaceable. Contains 20ml of a super deep and high covering black BOLD ULTRA INK, that is made of extremely low-viscosity, alcohol-based formula. Ink is weather and UV resistant, making it a real "made to stay" formula. The luscious, semi gloss finish ULTRA INK, can be applied to almost any surfaces. The ink is delivered through the markers felt tip by a refillable, pump system valve, that works perfectly with extremely low-viscosity inks, offering exceptional flow, especially on non porous surfaces like metal, glass or plastics. Montana Cans BOLD ULTRA INK is permanent and highly abrasion proof, resulting in extraordinary high coverage and super quick drying time.