Cap, Blue, Ultra-Micro UV-Cuvette. UV-Transparent Cuvettes are a disposable alternative to quartz cuvettes in DNA, RNA and protein analysis as well as many other applications between 220nm & 900nm. Ultra-micro sized UV-Cuvettes may be used with sample volumes as small as 70µL. Ultra-micro UV-Cuvettes are available with 15mm window heights to match the two standard beam heights of most spectrophotometers.The proprietary plastic material offers chemical compatibility superior to that of conventional plastic cuvettes of acrylic or polystyrene, and may be used with most polar organic solvents.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.