This is a protective Cap / lens cover for the Infa Ray Jerry 31's. I use them for airsoft and wanted to have something to protect the glass from any potential BB hits. Hope these work out for you! They do reduce a little bit of light transmission. But I'm ok with that to protect the glass.

I did not use any supports and I printed mine with .16 line spacing. They should work good with the standard .20 line spacing.