Feature

• Made of Aluminum Alloy, Pentagon Cutout, 12mm 0.3" Width, Light Weight

• 2 Pieces of Plastic Adapters Can Fit Diameter 32-34mm of Side Focus Knobs

• 100mm 4.0" Outer Diameter, w/ One Screw Pin to Lock the Wheel onto the Knob

Specifications

• Outer Diameter: 100mm / 4.0in

• Inside Diameter: 37mm / 1.45in

• Width: 12mm / 0.5inch

• Weight: 55g / 1.9oz

• Material: Alluminum alloy

• Adapters Inside Dia.: 32mm and 34mm

• Accept DIY marking or sticker of 5mm width

• Easy of use: first try the adapter for the side focus knob, fill the adapter into the side wheel, assemble the side wheel on the side focus knob, at last faster the screw pin.