Universal Camera Lens Support With Standard 15mm Dual Rod Clamp Rail Block The Lens Support is made of hign aluminum. You can vary the height of the support by the adjustable knob in the middle, until it meets the lens. Standard 15mm diameter 60mm distance between holes rail rod clamp allow you to mount it on rails of any 15mm rail rig. The arc interface comes with the rubber gasket which protect your lens from danger. Material: aluminum alloy Color: Black body & Red knob Package Contents: 1 * double-hole pipe clamp lens holder bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.