This pack includes green, orange, violet, and white chalk markers. They are perfect for notices, menus, events, and crafts. The semi-permanent ink formula is suitable for both indoor and outdoor use and won't run off in light showers once dry. Each marker features a reversible chisel and bullet tip (4.0mm to 2.0mm). Designed for use on conventional slate chalkboards and glass, they can be removed with a damp cloth or non-scratch scourer. Please note, these markers are unsuitable for use on vinyl, wood, or painted MDF ‘chalk’ boards. The product is made from 69% recycled materials (percentage based on total weight of product excluding the ink).