Zalman NC1500-B Laptop Cooling Pad with Pure Aluminum Panel (NC1500-B) Sleek design incorporating a high quality 2mm thick aluminum panel with a fine curvature and great cooling performance. Premium aluminum treated with D.S.A. Surface Processing. D.S.A.( Diamond Cutting, Sand Blasting, Anodizing) It is compatible with 17 inch/15 inch/12 inch laptops.