WRP-S405-Seat Guide Wheel (set of 4)

WRP-S405 Guide Wheel set of 4 wheels.
Used For; holding the seat to the dual rails.
Used By; All Wood S3, S4 and M1 Models 

These four wheels are located underneath the seat.  The diameter of the guide wheel is 3cm.

Please see breakdown photo of seat to refer to WRP-S405