This DebonAir air guide rod by RockShox is a replacement part for your SID B4 suspension fork with model year 2020. It is suitable for a 29" version with 32 mm stanchion tube diameter and 110 mm travel, as used on some Canyon Lux bikes.
Compatibility:
SID suspension fork B4 model 2020 for 29" with 32 mm stanchion tube diameter and 110 mm travel