V1.1 Normal
https://s.click.aliexpress.com/e/_DDauWmz
V1.1 Wear resistant
https://s.click.aliexpress.com/e/_DFJ62fn
These links are affiliated URL. If you purchase via link above it will give tiny cent of commission to the community organizers.
(We are not Mellow employees, just 3D printer enthusiasts)
This will not hurt your wallet and at the same time help us to maintain the GitHub better.
The new model replaced one aluminum parts to hardend steel to increase strength.