They arrived today, but unfortunately the weather didn't cooperate to test flare. They are made of a fine plastic, very light, possibly less than 0.5g and when stationary the camera will bear the load without issue. I'm not sure about flying fast with the camera pointed sideways, that might tax the gimbal motors. The colour is a shiny browny black. There's no evidence of vignetting with the version that fits the stock filter. The photo below was made from video with the lens hood fitted using Microsoft ICE.