Quote Originally Posted by Scott. View Post
I bought mine from Intershoot:

https://www.intershoot.co.uk/acatalo..._Elements.html

[EDIT]
I just checked back in my email and these were the ones I ordered for my 300s
https://www.intershoot.co.uk/acatalo...Clear-158.html

are they 16mm usual stuffs 18mm there ??