Feature: 1. Aluminum Alloy Material: Made of high quality aluminum alloy material, CNC accuracy machining process, surface anodized, durable and long service life. 2. Knob Type Locking: The knob type locking is convenient and reliable, and the locking knob can be rotated to lock the ball head, allowing the camera to be safely and stably parked on the platform. 3. Good Performance: This horizontal adjustment platform can be used on some tripods without a level. Improved the position of the level and set it to the outside of the platform. When it is installed between the tripod and the ball head, the level will not be blocked. 4. Mounting Screws: Platform diameter 66mm/2.6in, 3/8 inch mounting screws, two 1/4 inch mounting screw holes, which can be used to install block clamps. The bottom 3/8 inch mounting screw holes can also be matched with 1/4 inch conversion screws. 5. Strong Compatibility: Suitable for different kinds of photographic equipment with convertible 1/4 inch and 3/8 inch screw on the platform and is connectable with 3/8 inch screw hole at the bottom. Specification: Item Type: Tripod Leveling Base with Bubble Level Material: Aluminum Alloy Color: As Pictures Shown Weight: Approx. 292g / 10.3oz Application: Suitable for Nikon, for Sony and other SLR Cameras . Package List: 1 x Ball Head2 x Wrench1 x Conversion Screw1 x Storage Bag