Rail sliders. Cut to length. They are a wear item that should be checked and replaced when needed . Sometimes called hyfax
There are 2 of this required per skid.
This part will fit:
Yeti from 16 to current
Timbersled 14 to current
Yeti SnowMX Dealers
This Yeti SnowMX Part may be at a location near you! https://yetisnowmx.ca/authorized-dealers