The filter holder is used for setting the square filters onto the camera. The filter holder can hold up to three filters at the same time allowing for creative use of light correction or special effects.Description: * Compatible with the Cokin P series filter system. * To use the square filter holder, an adapter ring (sold separately) must first be mounted on your lens. Slide the filter holder onto the ring adapter until it snaps into place. The filter holder can hold up to three filters at the same time allowing for creative use of light correction or special effects. The same set of filters can easily be shared between lenses of different sizes as long as each lens has an adapter ring installed. * Made of high impact plastic for an extremely solid and lightweight feel. * Includes filter holder only. Tianya brand.Usage: 1. Screw the ring adapter onto your lens. 2. Slide the filter holder on the ring adapter until it snap in place. 3. Slide the filter into one of the filter holder slots which is depended by your filter's size.FOR MORE COKIN ACCESSORIES TYPE COKIN IN SEARCH TO FIND ALL OUR RANGE.Package Includes: 1*Filter HolderPLZ watch the tutorial to understand the usage of the Filter Holder:https://www.youtube.com/watch?v=6OKeS0cefgc