Snake River Prototyping BlurFix Air 3-Pack Filter Bundle for GoPro HERO3/3+/4 Cameras, Includes BlurFix Air with CP Filter, ND4 Filter, ND8/CP Filter Snake River Prototyping BlurFix Air with CP Filter - BlurFix Air with ND4 Filter - BlurFix Air with ND8/CP Filter - 3x O-Ring - 3x Microfiber Cleaning Patch - 3x Storage Case - Snake River Prototyping 1 Year Warranty Filter Type: Circular Polarizer2-Stop Neutral Density 4Neutral Density 8 and Circular Polarizer Construction: CNC Machined DelrinGlass Filter Compatibility: GoPro HERO3/3+/4 Cameras Weight: Each Filter: 0.27oz (7.6g)