• Fits Hero4, Hero3 , Hero (choose 40M or 60M housing)
• Professional color correction for green water diving
• Most effective from 15 to 75 feet deep
• Secure snap-on design for easy installation 
• Includes tether and storage bag
• 3 year warranty-satisfaction guarantee

How to tell which GoPro housing you have:

The PolarPro Magenta filter is the perfect filter for filming in green waters. From depths of 15 to 75 feet the Magenta Filter will provide professional grade color correction while scuba diving. The GoPro's auto white balance has trouble recording colors at depth due to red light loss. The Magenta Filter helps reduce excess green color. Snap-on an magenta filter on your next dive and capture the best color possible.