Scuba and Snow Filter Kit (Red, Purple, Pink, Gray) with Lens Brush Pen, Dust Blower and Microfiber Cleaning Cloth for GoPro Hero3+ and Hero4 Action Cameras Crafted out of a high optical grade acrylic for maximum sharpness Snaps on and off easily from your GoPro Hero4 and Hero3+ standard housing (NOT compatible with dive housing or Hero3) Red scuba tropical filter helps with color corrects while capturing footage in blue salt water Purple filter is ideal for freshwater lakes and reservoirs that appears green due to algae Gray neutral density filter reduces light to prevent overexposure in snow or bright scenes. Pink warming filter changes color temperature.