Canon Extender EF 1.4x II Filter Type_Filter Holders but it's not bare-bones either:

but it's not bare-bones either: It has a rotating back

Includes front and rear caps

Each jar contains 20 tablets

and includes its original box

Canon Extender EF 1.4x II Filter Type_Filter Holders but it's not bare-bones either:Canon Extender EF 1. 4x II teleconverter, in excellent cosmetic condition. Increases the effective focal length of the lens mounted to it by forty percent while maintaining complete communication between lens and camera. Since the teleconverter extends into the back of the lens, not all lenses may be mounted. Please confirm compatibility between your intended lens and this teleconverter. Clean glass and excellent function. Includes pouch.