Yongnuo Yn24ex Yn24 Ex E-ttl Twin Lite Macro Flash Ring Flash Speedlite For Canon Camera Dual 2pcs Flash Head 4pcs Adapter Rings - Photo Studio Kits - AliExpress
Diffuser
Canon Macro Twin Lite MT-24EX Macrolite Flash Unit for use with Canon MP-E 65mm, EF 50 f/2.5, 100 f/2.8 Macro Lenses at KEH Camera
PhotoMed Macro Flashes
Amazon.com: Canon MT-24EX Macro Twin Lite Flash for Canon Digital SLR Cameras : Electronics