Features:Main material: ABS Color: white Bottom diameter: 6/2.36'' Dimensions: 8 x 7.2.Package weight: 100g Compatibility: for personal watercraft, boat, caravan and truck Contents:1 x Compass 1 x magnetic declination adjustment pick 1 gummed paper.2 screws 1 manual book.Note:1. This compass is designed for cars, boats or watercraft and the reading is totally opposite to the normal compass. For example, when facing NORTH while the compass is placed in front of you, the reading shows "N" facing you and "S" pointing north. The reading facing you is the correct direction you are facing i.e. "N".2. The measurements are taken by hand, the sizes indicated may vary from 0 to 2.5. Thank you for understanding.3. The item's color may be slightly different from the pictures. Please take the real one as the standard.