Features: 12 pieces Color Gel Filters for lighting effects and color correction. Cut to fit most Flash model. Includes the largest selection of popular colors for controlling light from your strobes. You can also use combinations of these filters for a whole lot more variation to the color of light. Applications are almost endless with these gel colors， from cool effects that you can do for backgrounds， for enhancing skintone in portraits， color correcting or matching ambient， simulating different kinds of light， special effects， cheating white balance and a whole lot more Fastened by Velcro and rubber band，easy to use Specifications: Material: Plastic Color Filter Size: approx. 7.4cm x 4.6cm Filter Holder Size: approx. 6.7cm x 7.5cm Velcro Size: approx. 24cm x 2.9cm Colors included: Magenta， Red， Dark orange， Middle orange， Light orange， Yellow， Purple， Navy blue， Middle blue， Light blue， Dark green， Light green Package included: 12 x Color Filter 1 x Filter Holder 1 x Velcro (flash not included)