Created with and tested by the BRK Mountain Rescue Service, this feature rich precision-Instrument was designed with durability-Inch mind. Similar to the standard Alpine, but with 1:25,000 and 1:50,000 metric scales; this compass still features the patented thermo-elastic compass capsule, the unbreakable polished aluminum sighting mirror,-Integrated clinometer, various map scales and cut-outs for map marking, and a removable comfortably wide neck lanyard. Dimensions: 2.5-Inch x 4.3-Inch; Weight: 2.5 Ounce.