Canon Flash Macro Ring Lite Adapter 72C - Open Box
The Canon 72C Macrolite Adapter makes it possible to attach the ML-3, MR-14EX or MT-24EX macro flashes to most lenses with a 72mm filter thread, including the Canon EF 180mm f2.8L Macro Lens.
This is an open box item but is in full working order, as new, and comes with a 12-month warranty.