
Hula Toolhead kit for Annex Engineering K3
September 14, 2026
HY510 Thermal Grease – 1 g Syringe for Heatsink
September 28, 2026MathematicalPotato Toolhead v2 for Annex Engineering K3 Hula compatible
$98.00 CAD (≈ $69.49 USD)
Available on backorder
This is a preorder, estimated time of delivery is 2 months (~60 days) from end of preorder period.
The preorder period will last 2 weeks, will end Sunday night, November the 15th at 11:59pm est. After that, all the components will be ordered and should take about 60 days to arrive. Your orders should start shipping soon after the 60 days are up.
New design of the classic K3 aluminum toolhead. Nearly full-metal construction with generatively designed SLM bracing for greater stiffness and even cooler aesthetics. Designed for super-wide rail backers (as large as you can fit in K3 travel on this version) and includes many improvements.
Key features:
- Optional inverted Y-rail configuration so the same Y spacers work with any rail thickness (or use the stock configuration)
- New K3rabiner PCB mount between the X and Y plates for greater extruder compatibility (including DFA)
- SLM Generative lower assembly (Mathy’s recommended configuration)
Includes:
- 3 Aluminum plates
- 2 SLM aluminum parts
- 1 SLM titanium part
- Hardware
All tapped and ready to go.
Requires the extruder mount, the duct, and the cable mount to be printed.
Does not include toolboard, hotend, extruder, beacon, fans, printed parts, rails/rail carriages, or anything else not listed above.
Designed to be used only with the Chube Conduction or Air.
Full design files, CAD, DXFs, STLs, and assembly images:
https://github.com/MathematicalPotato/MP_DooKi3_Toolhead_V2
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