28/B/I/20 - Micro Cells with stoppers, reduced nominal volume, PTFE stopper

Micro Cells with stoppers, reduced nominal volume to <20% of Standard rectangular. Closed by PTFE stopper, providing a liquid-tight seal. Two polished windows, walls polished internally, fine ground externally, suitable for use with all standar cell holders. Self-masking solid black walls enhance sensitivity and improve linearity at higher absorbances.