Hey there, So I've made parts for the Innovv cameras before (mounts for the K2 in the Yamaha community) but this is my first mass retail sale of parts specifically for the C5, K2, K3,K5. These are lens protectors that I used for a year and 7000 miles in desert/snow/rain/hot/cold and it saved my K2 camera from a lot of damage. These are made of some of the more durable material you can 3D print with, Carbon Fiber Nylon/PA6.These protectors come with a K2/K3/K5/C5 specific fitments, and offer Sapphire lenses for incredibly scratch resistance/durability. This is the only lens protector for a action cam that offers Sapphire lenses! Click this link to get the lens protector!