mini small button compass Features:1.These well-made mini compasses are perfect for use in compact, mini, or pocket survival kits. Or put them onto your walking stick, knife, binoculars, backpack, etc.2.OD size: 12mm 3.Liquid filled, works under sub-freezing temperatures.4.Easy to read compass dial sealed with clear acrylic top and black plastic base5.Grooved edge for easy carrying with a lanyard ...