Rogue Flash Adapter: The Rogue Flash Adapter’s stretchy silicone mount quickly attaches to a rectangular speedlight flash and incorporates a metal ring mount for attaching magnetic round flash modifier components. Modular Magnetic Light Modifier System: The Rogue Flash Adapter is one component of the modular Rogue Round Flash Magnetic Light Modifier system for camera flashes, including: Rogue Flash Diffuser Dome, Rogue Flash Grid 45, Rogue Flash Snoot, Rogue Flash Gel Lens, Rogue PF Adapter, and Rogue Round Flash Gel Kits (Ultimate Portrait Kit and Color Correction Kit). FOR LARGE SPEEDLIGHT FLASHES: The Rogue Flash Adapter STANDARD incorporates a silicone mount designed to stretch around flash heads measuring from 40x60mm to 50x75mm (approximately). It does not fit the Canon EL1, which is too large. Flash Compatibility for Rogue Flash Adapter STANDARD (and similar size flashes): Canon 580EX, 600EX Godox TT685, V860, AD200 Metz 52 AF1 Nikon SB700, SB910 Nissin Di700A, MG10 Sony F45, F60 Yongnuo 685 FOR SMALL SPEEDLIGHT FLASHES: The Rogue Flash Adapter SMALL fits smaller flashes with flash heads measuring from 35x55mm to 40x70mm (approximately). Flash Compatibility for Rogue Flash Adapter SMALL (and similar size flashes): Canon 430 EX Godox TT350 Nikon SB600, SB800 Nissin i40, i400, i60A, i600, MG80 Pro (without zoom head) Olympus FL-600R Sony F32 Rugged and Durable: The Rogue Flash Adapter is designed to withstand the rigors of professional event photography. It is made from durable silicone rubber, high impact polycarbonate, and a plated steel ring. Weight 3.6 oz (102g).