Material: Made of quality durable ABS This is a must for all EOS bodies! Use this cap to protect the contacts when a lens is not attached. Compatible with: EF Lenses, Tele-Extenders and Extension Tubes. Prevents Foreign Objects From Entering Your Camera and Lens Protect Your Investment Easy Twist On and Off This is a must for all EOS M bodies! Use this cap to protect the contacts when a lens is not attached. Compatible with: EOS M Lenses, Tele-Extenders and Extension Tubes Sturdy plastic protects against bumps and debris to keep your camera in its best condition. This Kit Includes Some Of The Essential Accessories You Need To Take Full Advantage Of Your New Canon EOS M M2 M3 M5 M6 M10 etc.Camera Body & EOS M mount lenses