my laser is a 200mW violet laser and it only came with one diffraction head
http://www.lazerpoint.com/p-200mw-1000m-405nm-adjustable-focus-blue-laser-pointer-pen-black_2080296:anyone::anyone::anyone::anyone::anyone:
where can i by extra heads from?
you generally want to avoid 301 lasers i have a few and they either output no ware near what you bought them for or in my case it outputs way too much and just kills itself (had a 50mW laser it actually outputted 200mW until it killed itself two weeks later
i was going to order the first laser until i found this laser
Powerful 200Mw 1000m 405nm Adjustable Focus Blue Laser Pointer Pen (Black) with 1 × Laser Pointer Pen 2 × 1.5V 300mAh Battery - Free Shipping
it's similar but it has an extra diffraction head and a slot to put different heads in iv'e...