Specification Category Map gaugeMaterial PlasticMetalSize 97 x 45 x 17mmWeight About 26 4gFeatures The map gauge is used for route planning with a map as you put the bottom wheel in an right angle to the map then you write the route you want to drive and after you can read on the scale how long the journey will be in kilometres The scales are 1 100 000 1 75 000 1 50 000 1 25 000 at one side and 1 500 000 1 300 000 1 200 000 and 1 150 000 on the other side Package Included 1 x Map Gauge