Is this the 2 piece (battery and screw on cartomizer) slightly over 9mm diameter? Male threaded battery and female recessed threaded cartomizers?
If so, according to AZSmokeFree it is KR808D-2 (aka E9), the less popular KR808D threading. The most popular and supported 2-piece threading is KR808D-1. KR808D-2 is a wholesaler model for rebranders - it has different threading and is incompatible with KR808D-1.
You can find blank KR808D-2 cartos at Vaporkings.com, some parts and prefills at AZSmokeFree,com. adapter to use KR808D-1 cartos (D2 to D1 adapter) at leCig.com. Rebranders with compatible models include Greensmoke, Smoke 51 Duo, Vapure (if they still exist). Some lists have Bloog as KR808D-2 but the current Bloog is KR808D-1, not -2.