LIGHT AND COMPACT - The silva curvimeter, with a size of approx. 9.5 x 4.5 x 1.3 cm and the weight of approx. 30g, this tool is lightweight and portable, with mini metal handle for easy holdingALUMINUM ALLOY- Quality aluminum alloy shell coated with ABS and aryl material, strong, wear-resistant, rainproof and durable for long time use.EASY TO USE- This curvimeter, our map measurer is easy to use, just put on the mini metal wheel on the map and rolling it, the pointer would point to the accurate scale, very convenient for sports or outdoor activities.QUICK CALCULATION- This meter can help you to quickly calculate the distance by measuring the distance between two points on the mapNICE GIFT- Nice gift for people who love outdoor activities. Good for outdoor uses, camping, hiking, cycling, hunting, etc.Note: The data is all manual measurement, please allow some 1-3cm error; due to the difference in light and display, there would be a certain color difference, please refer to the actual object received.