opteka sb-1 mini universal studio soft box flash diffuser for the nikon sb-900 sb-800 sb-700 sb-600 sb-400 sb-700 sb-900 sb-910 flash units - Walmart.com
Nikon SB-400 Speedlight Flash for select Nikon SLR cameras at Crutchfield
Nikon SB-400 Review
Nikon SB-400 Flash Review | Happy
Nikon SB-400 Speedlight - USED – Austin Camera
Vello Bounce Dome Diffuser for Nikon SB-400 Speedlight BD-NSB400
Nikon SB-400 Speedlight Essential Kit B&H Photo Video