The Foto&tech Soft Mini Flash Bounce Diffuser Cap is can be easily slipped on the top of the external flash unit using its elastic strap. It disperses the light over a wider area for a softer, more balanced and natural effect than you didn't use before. It helps to reduce hard background shadows and eliminates the annoying red eye effect. Specifications: Dimension(cm): 7.6×7.1×3.0, Product Weight: 1 ounce