Cuvettes have recessed windows to help protect against scratching and fit most commercial spectrophotometers and photometers. They are grouped by mold cavity number to maximize consistency between cuvettes and reduce variation in extinction coefficient.
Use the semi-micro size UV-Cuvettes for sample volumes between 1.5mL and 3.0mL, and the macro UV-Cuvettes for samples larger than 2.5mL. Ultra-micro sized UV-Cuvettes may be used with sample volumes as small as 70µL. Ultra-micro UV-Cuvettes are available with either 8.5mm and 15mm window heights to match the two standard beam heights of most spectrophotometers.
Ultra-micro UV-Cuvettes are now available individually-wrapped, DNA-, DNase- and RNase-free, for use with critical samples.