The Xit 404 Canon Macro EFL IS USM 100mm (IS) Focus Ring Kit Manta Line in conjunction with a gear makes up a complete Focus Gear for this lens. The ring kit is made of impact resistant ABS plastic. The Focus Ring is a two-part ring that is Gray and Red.
Xit 404 has designed a group of interchangeable and complementary components that allows the use of a variety of Canon lenses and SLR housings. Now you can swap lens configurations and still be able to manually zoom or focus. Start with a 60mm, switch to a 100mm, then add a teleconverter, or change from macro to wide angle, try close focus wide angle - with the Manta line you will always be covered.
All Manta components are constructed of impact resistant ABS plastic and color coded to help you combine components easily. Each component is clearly marked to assist you to assemble the components onto your lenses and with each other component properly.