1The filter can be used for underwater photography of a waterproof camera case. 2Screw fixation on both sides, don't worry about shedding 3Macro lenses are used to take pictures of flowers, small collectibles, COINS and stamps, insects, small creatures or small objects that require close detail. 4Simply snap the adapter ring in place. It fits to the outline of the housing well. 5Specifically Designed for HERO 8 Black motion camera for macro shooting. Condition: 100% Brand New Item Type: Macro Lens Filter Material: Optical Glass + Aluminum Alloy Color: As Pictures Shown Product Size: Diameter of Filter: Approx. 58 mm/ 2.3 in Applicable Model: For HERO 8 1 x 16X Macro Lens Filter 1 xStorage Case 1 xCleaning Cloth 1 xHand Strap 1 xAdapter Ring 1. Please allow 13cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3.The product is installed in the original waterproof case, not on the machine.