This is a classic 20mm diameter liquid-filled button compass with clear green mark. Unlike the other normal 20mm liquid compass, this 20mm liquid compass is no bubble in one year or more. It is specially made in high quality.
It has groove edge to hang on a lanyard string or sew on clothes. This small compass is perfect for decoration use in compact, mini, pocket survival kits, or integrated with walking stick, whistle, knife, binoculars, backpack, etc.
Specification:
Material: plastic case, metal magnetic needle inside, damping oil filled
Colors Available: as photo shown
Compass Diameter: 20mm
Compass Thickness: 7.8mm
Oil filled, works under sub-freezing temperatures.
Easy to read compass dial sealed with clear acrylic top and black plastic base
Grooved edge for easy carrying with a lanyard.