The SIRUI VH-15 Professional Fluid Video Head has a fluid system for smooth panning and tilting. The panning resistance is preset to produce very smooth pans and the tilt mechanism has stepless friction adjustment. Since there are many different sizes of video equipment, having stepless friction control lets you precisely select the proper friction for your gear.The tilt friction control lets the head tilt forwards or backwards (+70/-90°) quickly when set to the lowest friction setting. The spring-assisted counterbalance mechanism (4 kg) helps to keep the head in position when the camera is properly balanced on the head - the head will stay in the selected position without any movement. This provides added support and improved tilt control. As you add more resistance (turn the dial clockwise), you smooth out and have better control of your tilts.To make horizontal alignment of the head extra easy, there are 2 bubble levels - one on the base of the head to align the tripod and one on top of the video head to align the camera.Included in the box: video head, VP-125X Quick Release plate, telescoping handle, protective case, tools, instruction manual, warranty cardFluid system provides soft smooth movementSafety lock system - prevents slippage on the plateAdjustable friction in both horizontal and vertical direction360 ° panorama function2 spirit levelsLong, adjustable release plate with 1/4 inch and 3/ 8 inch thread removable plates glide slope : 125mmRubberized armDiameter of base plate: 85mmWeight: 1,7KgHeight: 122mm