Snake River Prototyping BlurFix3+ 55 Adapter with CYD Filter for HERO3/3+/4 Camera Housing Snake River Prototyping BlurFix3+ 55 Adapter with CYD Filter for HERO3/3+/4 Camera Housing - Large O-Ring - Medium O-Ring - Small O-Ring - Nylon Lanyard Cord - Snake River Prototyping 1 Year Warranty Material: Precision CNC machined from Delrin Compatibility: HERO3/3+/4 Camera Housing Filter Type: CYD