The risks are genuine and high. Don’t even think about looking at the laser even from a distance or what you might consider a safe position. Reflections can be just as bad as direct exposure. The ones that come with the laser are probably at the lower end of what is required, but would do in a pinch. I bought these to replace my supplied ones when I had a blue diode laser. Be aware of the wavelength that they protect at if you do any comparisons. Diode lasers need a different glass that CO2.
Hi, the glasses I linked to are perfect for that range of wave lengths they cover 190nm to 1700nm. OD4+ is perfectly fine as well. Eaglepair are a very well recommended brand. So if you have access to Amazon then these will do very nicely for you.
Yes, those would be fine. OD 5 is better than OD 4 but is un necessary for your laser power, but there is certainly no down side other than cost usually.