Summary:
The 492 Center Ball Head from Manfrotto is a 2.6" tall, aluminum support with a load capacity of 8.8 lb. The head has a single ergonomic locking knob that controls the ball and pan movements at the same time. The 4.9 oz head has a cut notch on the side that allows you to position the camera at a 90° angle, and the camera attaches to head via its 1/4"-20 mounting thread.
            General
Head Type	Ball Head
Camera Mounting Screw	1/4"-20 Male
Quick Release Plate Type	No Quick Release
Load Capacity	8.8 lb / 3.99 kg
Number of Bubble Levels	None
Friction Control	No
Independent Pan Lock	No
Material	Aluminum
Pan & Tilt Range
Vertical Tilt	0° to +90°
Panning Range	360°
Physical
Dimensions	H: 2.6" / H: 6.6 cm
Weight	4.9 oz / 140.0 g