Looking to make your Reaper or Twin super sleek? 
 
This airflow ring has a 1mm airhole with a slight chamfer which works as a pilot hole so that you can drill your own perfect sized airflow hole. 
 
22mm Straight ring.
316 Stainless Steel
1mm Air/pilot hole with chamfer
 
I would highly recommend the use of a quality metal drill bit and the appropriate safety equipment when drilling this item.
 
Atomiser and stand NOT included. This listing is for the airflow ring only.