4pk Replacement Donut & Cup Set — V4, V3/V5, & SAI Heaters
🔄 Ceramic Donut Heater Replacement Sets
Replacement ceramic donut heater, spacer, and cup sets for the V3, V3.5, and V4 diffusers. This is for 4 large or medium donut and cups — they come as a set. You can have a mix or all of one kind; just leave a note on checkout specifying 10mm medium or 13mm large.
Only the 13mm donuts without cups are for the V4 — you can get them with spacers as an option. If there is no note on checkout, we will default to large donuts.
📑 Size Options
| 10mm Medium Donuts For V3, V3.5, V4, and SAI heater rebuilds |
13mm Large Donuts For V3, V3.5, V4, and SAI heater rebuilds (default if no note) |
| SAI-Sized Donuts 10mm leads uncut donuts to rebuild your SAI coils |
Mix & Match Leave a note at checkout for your preferred combination |
📈 Safety & Testing Reports
We take product safety seriously. Here are the MSDS reports for the V3 and V3.5 ceramic donut heaters:
| Offgas Test on Donut Heaters | SGS Report 1 | REACH Report 2 |
The 7mm donuts (for Atmos Kiln RN and other manufacturers) can be found here.
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4pk Replacement Ceramic Donut & Cup Set
10mm medium and 13mm large ceramic donut heaters and cups for V3, V3.5, V4, and SAI rebuildable atomizers




























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!