4 inches versus 6 inches The 6-inch suction cup has a stronger adsorption capacity, and it is soft and easier to attach to curved surfaces such as car glass.If you install it on a car, we recommend using a 6-inch suction cup. Metal fixed bracket gopro/DJI Osmo Action 360° Adjustment/Suction Cups With High Suction Power/Aluminium/Folding Storage Step For Usage * It is recommended to keep the bottom of the suction cup and the inside of the press clean, andthe suction is stronger. 1.Press the suction valve several times 2.Until the white line disappears 3.Lifting the release button High suction Practical tests Surface: glass Test load: 16.8L water (18kg) Test result: 24H non-falling This data is for reference only Multiple Usage Options Several scenarios, many ways to use them 1.GOPRO Bracket（Take motion pictures and see how far the car has travelled） 2.Car Mount（Holds mobile phones, tablets and other electronics） 3.Multiple Phone Holders（For live mobile phone streaming） 4.Torch Clamps（Holds a torch or other cylindrical object） 5.Tent Clamps（Securely clips onto your tent, allowing you to enjoy camping, picnics and other outdoor activities with confidence） 6.Crab Clamps（Secure all kinds of equipment so you can move around without worry） High Suction Power Absorbs a wide range of materials to ensure a clean surface Glass Surfaces/Tile Surfaces/Painted Surfaces/Wooden Surfaces

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