B08JCSN94R guizhoujiufu Camera Accessories All Metal Wormdrive Macro Rail Fine Focus Focusing Arca/RRS Lever Clamp Compatible (Color : Black)

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Material: Aluminum Alloy
Adjusting Range: 115mm / 4.5in
48mm diameter metal thumbwheel with 1/4 inch-20 Screw.
Arca/ RRS compatible 55mm dovetail plate w 1/4 inch-20 threaded socket.