FLIP3.1 Underwater Color Correction System Top Flip for GoPro Hero3
The Top Flip is fully compatible with FLIP3 frames, allowing you to use any FLIP3.1 filter and 55MM adapter in the top position. Filters and Flip 3.1 sold separately. You can mix and match 3.1 filters and 55MM adapters to either TOP FLIP or side positions.
This does not fit the Flip 4.