Someone pointed that they bought a 100mw 405nm laser for $4.
In other postings, I saw that the same laser by US company can go up to $50-$60. Do it mean are these company earning >90% gross profit just because they label it correct
You get what you pay for!
These pens are almost everywhere. They are mass produced and quality check is very loose or not present at all resulting in very cheap prices
these came as set of three R/G & V
free shipping ~$3 each pen
I got 12 for $38 took 19 days to arrive- all WAY overspec
enjoy the laser porn by hak