As one of its daily deals, B&H Photo-Video offers the Flip Filters Flip3.1 Combo for GoPro, model no. BS-FLIP31-COMBO, for $49.95 with free shipping. That's the lowest total price we could find by $39. It features the Flip3.1 Underwater Color Correction System with Dive Filter, Flip3.1 Underwater Color Correction System Top Flip, Flip4 Shallow Underwater Color Correction Filter, and Flip4 Deep Underwater Color Correction Filter. It fits the HERO3, HERO3+, and HERO4 cameras. Deal ends today.