The Alvin 18 x 24 Green/Black Professional Self-Healing Cutting Mat is a versatile and durable tool for a wide range of graphic arts hobbies crafts and industrial applications. Crafted with a 3mm thick vinyl composite material this reversible mat features a gridded surface with 45 and 60-degree angle guidelines and 0.5-inch grid lines. The self-healing non-stick surface is impervious to abrasions and liquid spills ensuring a long-lasting performance. Backed by the manufacturer s USA warranty this cutting mat is the perfect choice for professionals and hobbyists alike.