SnugPak Ndur Button Compass Black. R Button Compass is about the diameter of a US penny and very lightweight. Button compasses are excellent for quick checks when you need to determine general direction and a necessary addition to your survival kit. Specifications for SnugPak Ndur Button Compass: Manufacturer: NDuR Color: Black Weight: 0.5 oz Length: 0.38 in Width: 0.75 in Height: 0.75 in Features of SnugPak Ndur Button Compass Liquid Filled Water Resistant Very lightweight Diameter of a US penny Perfect for survival kits Package Contents: SnugPak Ndur Button Compass SnugPak 51590: Ndur Button Compass Black