Think Tank Photo Strobe Stuff (Black) Fits SB-910, 600RT or similar DSLR flash with attached diffuser, attached external battery pack, gels and extra batteries Holds large flash with attached diffuser Specially designed front pocket with cable pass-through to attach external battery pack Attaches to any Think Tank Photo belt or beltpack as part of Think Tanks Modular Component System (sold separately) Exterior Dimensions: 4.6" W x 9.8" H x 3.5" D (11.7 x 24.0 x 8.5 cm), Internal Dimensions: 4.3" W x 9.3" H x 3.0 D (10.9x 23.9 x 7.4 cm), Weight: 0.4 lbs (0.2 kg)