Several months ago I ordered a bunch of laser optics and lens/mirror holders from separate sources. The holders came from China and they were shipped loose, unwrapped in a box. All the bouncing around did a lot of minor scratching and dinging. I was not sure what to do and the supplier was no help. i was so busy with other stuff i set them aside. The lenses and mirrors were fine.
I decided to just sell them off at less than half the retail price to anyone who doesn't care about the dings or wants to try to polish them up.
The mirrors and lenses are very high quality. The lens is American made 50.8mm focal length and 20mm diameter.
They are both in the store now. Get 'em before they are gone.
"If you didn't build it, you will never own it."