The Sunpak Universal Diffuser Kit DFU-01 consists of two different sized diffusers: 7.5 x 6 inches & 5.5 x 4.3 inches. A strip of hook & loop fastener meaning they can be easily attached to most " Cobra Style" flash heads. Designed to soften the light & remove harsh shadows; particularly for portrait work, they fold flat when not in use for easy storage & transportation.