Speed Grids attach quickly and easily to most portable flash units using the non-slip Speed Strap (not included).
1/4 Speed Grid Code: HP-GRD4
The 1/4 Speed Grid which has a 1/4" cell size. the Speed Grids fit almost any shoe mount and most handle mount portable strobes, including Canon 420 though 580 and Nikon SB24 though SB900.
Attaches quickly and easily to the Speed Strap mounting system (not included). Usable honeycomb area is 3.5" x 2.25" (appr. 89mm x 58mm)- simply measure the front outside dimensions of your flash lens to assure fit. Rugged ABS/polycarbonate construction.