Description: To use the square filter holder, an adapter ring 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. Usage: 1. Screw adapter ring onto your lens. 2. Slide the filter holder onto adapter ring until it snap in place. 3. Slide the filter into one of the filter holder slots. Package Includes: 1 x ZOMEI P-Series Square Filter Holder 1 x ZOMEI P-Series Ring Adapter 1 x ZOMEI P-Series Lens Hood 1 x ZOMEI 10-Slots Filter Case 1 x ZOMEI ND4 filter 1 x ZOMEI ND8 filter 1 x ZOMEI ND16 filter 1 x ZOMEI GND4 filter 1 x ZOMEI GND8 filter 1 x ZOMEI GND16 filter