Hi...does it fit the flak 12-900? I’m having a bit of difficulty at the moment ,just got my lenses from amazon...great timing tho on delivery ..

They snugly fit in my Flak 12-900 frames. I had to really bend the frames to get the lenses in, but they did snap in.

Dear Customer, This is PapaViva Optics LLC. Customer Service Department, hope everything is fine with you. Regarding your question, this lens is not fit the 13 139. If you want to know the further details about this, please contact us via the Amazon Email, we will answer for you. PapaViva Customer Service Department is available online 24 hours. We keep continuously passion to connect with every client during pre-sale & after-sale process for every follower. Best Wishes. PapaViva Optics LLC.

After looking on the oakley site to see what 03-915 were and in the past doing research on both the original flak jackets and the flak jacket XLJ's, I am almost 100% sure that the connections for both of these lenses are the same. The XLJ's just cover a little more of your face.