• Fits Hero4, Hero3 , Hero (choose 40M or 60M housing)
• Reduces cameras shutter speed for smooth cinematic videos
• Creates a high-speed blur motion look 
• HD Glass ensures razor sharp clarity
• Snap-on design for quick installation/removal
• 3 year warranty-satisfaction guarantee

How to tell which GoPro housing you have:

The PolarPro Neutral Density filter will help reduce the cameras shutter speed for capturing smooth cinematic videos, or creating a blur motion. The ND filter allows the camera to shoot at a lower shutter speed which allows you to create a blurring effect to moving subjects. This is perfect for creating a sense of speed or smoothing out moving water. HD Glass ensures your images will have razor sharp clarity.