ANYCUBIC Kobra 4/Kobra 4 Combo 600mm/s Fast Printing Multi-Color 3D Printer Up to 8 Colors ACE 2 Pro Filament Drying APP Control FDM 3D Printer
$244.99
Aliexpress
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The only real improvement on the K4 Combo over the K3 V2 Combo is that color swapping is faster. You can not use the older ACE with the ACE 2 on the K4 unit to double up the colors to 8. The K4 uses a new nozzle system that cost $8 each, and are not compatible with the older K3 / K2 Nozzle system.