Collectibles Buy Kelvin Natural Sine Brunton Compass Brass Mining Compasses Ground diameter : 3 inches, Height : 2 inches, Functionality : Antique magnetic compass Material used : Solid heavy brass Color:Polished finish with fine markings,Compass : Magnetic needle points towards the north pole. Volume weight: 0.500 kg | usage: vintage navigational / collectibles , Hiking, Camping Compatibility : Portable , Model used In Military