Diffraction Grating

[craftycarper]

Hi Guys,
I have a green Laser pen model JD-850 (300mw). Im looking for the Screwable caps tp screw on the my laser to create diffraction gratting, Stars etc etc.
Can anyone point me in the right direction.
Thanks
Gav

 

[Dawinzi]

Go to the "OPTICS"

 

[Fenzir]

A green laser pen probably not actually be 300mw, but I may be wrong. You can buy these from amazon or ebay. sometimes you get a good deal on an auction and can get 5x and a green laser for <$5

 

[craftycarper]

Thankyou