Oroboros Instruments
Mitochondria and Cell Research – Marketplace
Product ID: 2432A-01 or 2432B-01
Volume-Calibration Ring (A or B) PVDF for O2k-Stoppers designed for use with 2.0-mL O2k-Chamber, white; attached to the stoppers
This link will take you to the Bioblast page for this product where you will find manuals, guides and other relevant information.
Volume-Calibration Ring