The LARK LCSA-4 Cuvette Adapter Mounts is made from high-quality black aluminum and is available in either standard or extended spring form. The extended spring version allows you to load the mount and pick it up easier. This is a standard Cuvette mount for short path length cuvette 1 – 5 mm. This cuvette adapter enables short path length cuvettes to fit in a 10mm cuvette holder.