This seamless clamp on gear ring clamps securely around the focus barrel of your lens by tightening one little screw (allen key is included). Once tightened, the slit in the ring disappears and makes the ring seamless. The tooth size is M0,8.
This side flag kit contains a left and right side flag including side flag hinges for the MB-25x matte boxes. The top flag wide (0330-0002) is included in this kit.