It has 5 modules, that can be pushed along the rail. The position of the modules from wide to narrow can be changed separately. The number of warps in one reed slot varies from 2-8. It depends on the type of yarn used.
RailReed comes with attachment details.
Price: 240€
Shipping: 25€
The instructions how to put the reed on your loom come in the form of booklet.
BOOKLET