This linear rail kit from Misumi is a great match for the Jubilee toolchanger 3D printer.
Even though they are a bit shorter than stated in the BOM the length are sufficient according to Josh.
What is in the package:
4X395mm Rails with C type carriage. Misumi SEB13-395
2X445mm Rails with H type carriage. Misumi SELB13-445
What is linear rails?
Linear rails are also called linear motion guides and linear slides. They are motion components used to achieve sliding motions in 3D printers. LDO linear rails consist of a stiff steel rail along with a carriage slide.