From Manufacturer
The Manfrotto Strobo Gobo Kit works with the Ezybox Hotshoe Strobo Bracket and the Direct to Flashgun Strobo Bracket to allow you to project patterns onto your subject or background. The system comes with a lens and gobo holder combination that mounts to either bracket in front of your shoe-mount flash. The lens is removable for an "out-of-focus effect if desired. Two gobos are included with the kit but the Strobo Gobo will accept any B size (86 mm) metal gobo.