Small Magnetic Compass Travel Compass or Military Magnetic Compass 50mm Ideal for locating positions on a map or in the field. Compasses are navigational instruments designed with the Earth’s magnetic field. They generally use a needle to indicate the direction of the North and prove to be invaluable when in the wilderness or out at sea. Large Font Size, Easy to Read. Excellent for hiking, camping, and outdoor activities. Inner Diameter. Material: Mainly Metal. Made in China. Labtex is a supplier of Travel Compass or Magnetic Compass in Bangladesh.