1. Can be easily installed between ball head and the tripod platform. 2. 76mm diameter of the horizontal disc, used to satisfy most bases. 3. Convenient to observe the level when opening the tripod. 4. 15mm diameter of the bubble level, clear and intuitive. 5. Fits for any ball head with base diameter no larger than 76mm. 6. Gives an accurate spirit level reading for the base of your ball head. 7. Can accommodate any 3/8 inch or 1/4 inch tripod stud.
