To firmly hold GamiLight lighting modifiers on your flash unit for worries free shooting.
It fits : Canon 580EX II, Nikon SB 900, Nissin Di 622 Mk2, Nissin Di 866, Mitz 54, Mitz-4i, Mitz 48 AF, Mitz 58 AF, Olympus FL50R, PN DMW-FL500, Sony HVL-F58 AM