Minimal 12mm chain riser back for K1 printer without needing a back riser plate.

This item was designed to be used with the front chain riser below but could be any 12mm riser:

https://www.printables.com/model/1239444-k1-extended-upper-chain-riser-with-ptfe-tube-guide

The suggested pair can be used with Creality K1 / K1C Unibody Riser Frame:

https://www.printables.com/model/891616-creality-k1-k1c-unibody-riser-frame