4pk Donut and Cup Sets
Replacement ceramic donut heaters, spacers and cups for the V3, V3.5, V4 and SAI heaters. Four to a set. Mix the sizes if you want, just leave a note at checkout saying 10mm medium or 13mm large. No note means large.
Pick your set
13mm donuts with v4 ceramic spacers
The V4 set. Only the 13mm donuts without cups are for the V4, and this is that set with spacers.
13mm donuts with v3/5 cups
Large donuts with the V3 and V3.5 cups.
13mm donuts, no cups or spacers
Just the large donuts, for a rebuild.
10mm donut coil, no cups
The medium donuts on their own.
10mm SAI uncut leads
Uncut leads to rebuild SAI coils yourself.
Which size
V3, V3.5, V4 and SAI rebuilds
Same devices, and the default if you leave no note
Leave your combination in the checkout note
Safety testing
Lab reports
We take the ceramic seriously. The offgas and materials testing on the V3 and V3.5 donut heaters is public: offgas test, and the SGS and REACH reports on the alumina ceramic.
Looking for 7mm
The 7mm donuts, for the Atmos Kiln RN and other makers, are on their own page.





























ronan (verified owner) –
These replacement donuts help me keep my atomizer working nice and smoothly.
Part of the best wax vaping system over ever used!