Width: 64mm. The 64mm (2.52") Discal Clamp is a Arca Swiss screw knob clamp. 1 x CP-64 64mm Quick Release Clamp. With the female thread of UNC 3/8" standard, and 3/8" to 1/4" Screw Adapter which can be used on virtually any head, tripod or monopod.
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