Helix Folding Ruler 12 Inch / 30cm (10052) Transparent plastic for easy measuring Graduated in both imperial and metric Customer will receive one in any of the following colors: Blue, Red, Gray or Clear. Color is random and cannot be chosen at this time. Transparent plastic for easy measuring ^Graduated in both imperial and metric ^Customer will receive one in any of the following colors: Blue, Red, Gray or Clear. Color is random and cannot be chosen at this time.