Cuvettes. Disposable standard plastic cuvettes available in two types, for transmittance through the visible range spectrum (340 to 800nm) or visible and UV range spectra (280 to 800nm). The visible range cuvettes are made from Optical Polystyrene (OPS) and the UV range cuvettes are made from PMMA. Path length: 10 mm; Capacity: 4.5ml.