The Stilo ST4 & ST5 (YA0600) helmet drink system kit contains three components that are required inside the ST4 & ST5 helmets:
- bite valve (YA0601)
- silicone tubing (YA0602)
- male coupling end (YA0603)
These three provide the connection to a Stilo drink bag (YA0605). The ST4 & ST5 drink bag (YA0605) is required to
