This is a set of 100 identical 3.5 mL polystyrene cuvettes and caps.
Replacement Cuvettes and Caps for the PASCO Wireless Spectrometer. Includes 100 cuvettes and 100 caps. These cuvettes are made from polystyrene. Use only solutions to which polystyrene shows good chemical resistance within these cuvettes – NOT compatible with strong organic solvents like acetone.
https://www.pasco.com/products/replacement-parts/se-8739#specs-panel