This is an Excel Anodized Aluminum Deluxe Scale Reference Rule. FEATURES: 1:48, 1:35, 1:25 scale Blue anodized aluminum construction. INCLUDES: One ruler SPECS: Length: 12-1/2" (317mm) Width: 1-1/8" (28mm) Thickness: 0.079" (2mm) mcw 8/11/05 ir/jxs