iOptron 3305A SkyTracker Ball Head (Black)

• Designed for users to mount and remove camera and lens quickly.
• Large aluminum alloy ball (1.5 inches, 39mm in diameter) provides super smooth movement and super strong grip. 360 degree panning. Head Tilt: +/- 90 degrees
• The safety stops on the quick release plate prohibit your camera from accidentally slipping out of the quick release adapter (easy to remove with hex wrench if desired). Also features 3-screw-position top plate.
• Screw size: 1/4 inch for camera; 3/8 inch for tripods. Also includes 1/4"-20 / 3/8"-16 tripod adaptor piece.
• Weight: 0.875 lb. Working Height: 3.875 inch. 2 Spirit levels. Load Capacity: 20 lbs.