Polaroid Universal Gel Soft Box Diffuser (Includes Blue, Red, Green, Amber, Yellow & Pink Gels) For Canon EOS, Nikon, Olympus, Pentax, Sony, Sigma, & Other External Flash Units Provides Soft, Diffused Light Includes 6 Colored Gels - Blue, Red, Green, Yellow, Amber, Pink Attaches With The Included Velcro Adhesive Tabs Or The Optional Polaroid Clinch Band (Sold Separately) Approximate 1 Stop Light Loss Dimensions: 3 3/8 X 4 (inches)