Precisely machined from a solid block of 6061-T6 aluminum, the Really Right Stuff LCF-41 Foot will replace the original foot of a Canon EF 200mm f/2L IS USM lens and provide an extremely durable and stable platform for your lens. The foot incorporates an Arca-type compatible dovetail that allows users to enjoy a lower profile and lighter setup. Also, the foot will balance properly even when using a professional camera body and a teleconverter. The bottom of the foot features a standard 1/4"-20 accessory thread and it comes with two safety-stop screws to prevent the foot from accidentally sliding out of some clamps. Additionally, it is made in the USA.