What's Included? (2) Flat 3M Sticky Mounts (2) Curved 3M Sticky Mounts (4) Long Straight Extensions (4) Short Straight Extensions (4) Flat Buckles Instructions 1) Clean surface (very important, dust and particles can reduce strength significantly) 2) Peel 3M Sticky (do not touch sticky side) 3) Apply light heat to sticky side (hair dryer) before application, will improve hold. 4) Apply to surface and hold with pressure for 30 seconds High Quality The 3M manufactured VHB 4991 adhesive is the strongest and waterproof. Multi Purpose Perfect for mounting on helmets, ski/skate/surf boards, dashcam, kayak or other action sports. Removable The adhesive mount can be cleanly removed when heat (e.g. from a hair dryer) is applied. Wide Compatibility Compatible with Go Pro Hero11, Hero10, Hero9, Hero8, Hero7, Hero6, Hero5, Hero4, Session, Hero3+, Hero3, Hero2, Hero1, Hero (2018), Fusion cameras.