Selfhealing professional quality rotary mat especially designed for use with OLFA rotary cutters. Doublesided with yellow grid lines on one side for precision cutting, solid on opposite for general cutting. Rotary mats protect your work area and greatly extend the life of your rotary blades. 18"x24". 1.5mm thick. Store flat. Freight Intensive Billable transportation charges for freight intensive items will be the greater of the dimensional weight compared to the actual weight. In addition to transportation charges, freight carriers may assess an additional oversize charge per package.