Yep, afraid you'd say that 16mm is right between the 2 sizes, one goes to 15.7, next one starts from 15.8, I don't have a Vernier to measure that Accurate
I’m pretty sure you want BLG-16-A160 Fits ID of 15.8 - 18. edit. Just checked. It is as above. Fits std and spider clip ons.
GB racing now do a threaded insert for their brake lever guard for the 1199, and possibly others, it's M18, and just fitted to mine.
That’s handy. Mine has been on a Daytona 675, GSXR 750 (I had to grind two notches into the hardware of the guard for that) plus a Pani. Only had to replace the blade once which was the 675