Bio-Rad ChromLab™ Software - Manual (Page 193)

Mixer
Instrument Guide | 191
To change the O-rings
1. Locate the O-ring in the groove on the mixer base and the mixer barrel
extension (if used).
2. With your finger, pry the O-ring out of the groove.
3. Insert the replacement O-ring in the groove.
Note: If you are using only the mixer body, then only one O-ring is
required. If a mixer barrel extender is used, two O-rings are required.