The ProMediaGear TRB3475 Pro-Stix 75mm Bowl Adapter is compatible with the ProMediaGear 34-Series Carbon Fiber Tripods. It replaces the standard flat apex that comes with the tripod originally. You may use the provided Allen key to remove the flat plate and you can easily install this 75mm Bowl Adapter. Once attached, you may then install your 75mm Half-Ball Leveling Head for a smoother and easier camera balance. This bowl adapter is made of aircraft-grade T6061 aluminum. It is lightweight and sturdy to withstand accidents. It has a black-anodized corrosion-resistant finish for added protection. The scratch-resistant finish also adds a better grip to your tripod head once it is level.