Professional quality for all kinds of graphic arts, hobby, craft, shop and industrial applications, these self-healing and reversible cutting mats are 3mm thick and extra durable. Made from a unique composite vinyl material, designed for both rotary blades and straight utility blades, they provide a long-lasting, non-glare surface that can be cut and slashed constantly without showing marks or cutting lines. Can also be used as a desk blotter or general-purpose work mat.Self-healing, reversible, non-glare surface is 3mm thick and extra durable.Will not dull blades. Printed grid pattern includes guide lines for 45° and 60° angles and 1/2" grid lines. All four edges are fully numbered and graduated with 1/8" hash marks that extend beyond the zero base line for convenience. The larger mat sizes 24" x 36", 30" x 42", 36 x 48" include internal horizontal and vertical graduated hash marks. Non-stick surface is impervious to abrasions and liquid spills. Hanging hole for convenient storage.Cutting mats are available in three versions:1)Green on both sides with printed grid one one side only.2)Black with printed grid on one side, green on the other.3)Translucent with printed grids on one side only. Perfect for use with lightboxes or other see-thru applications.