... . 2. Material: Aluminium 3. Specification: 150mm, 300mm. Ratio-scale:1. Usage: measuring the scale of map.2. Material: Aluminium3. Specification: 150mm, 300mm ... , website address, etc... Measuring Tools: Stainless steel rulers,Farming Squares, Combination squares, Measuring wheel, Try Suqare, Digital Calipers, Aluminium Try square ...