Professional Compatibility: Designed for X3 official waterproof case, easy to install, just one buckle (Note: only includes the filter, not the waterproof case) Pink Filter: suitable for depths of 1-5 meters diving shell, commonly used in snorkeling freshwater waters or seawater waters, to correct bluish color. Please note:The color may be a little different, which does not affect use. Colour:Pink Material:Acrylic Package Contents: 1 x Dive Filter 1 x Tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.