Concentrate the light from your shoe-mount flash for dramatic cinematic lighting with my easy to use snoot. Perfect for everything from dramatic portraits to concentrating light on background elements. Attaches & removes in seconds using my popular Speed Strap (not included, see below). made from tough ballistic nylon with grey interior that produces a soft falloff. Fits most any on-camera shoe-mount strobe. 8.5" long. Exclusive Patent Pending design. Speed Snoots are adjustable to fit a wide variety of flashes, including Canon's 430 to 580 Speedlites & Nikon's SB24 to SB900 Speedlights. Measure the outside circumference of your flash, then add 1.25" (32mm) for the added thickness of the required Speed Strap. If your final measurement falls between 8.5" (21cm) to 10.5" (27cm) the Speed Snoot will fit properly on your flash.