This aquavitro Scalpel has been specifically designed for use in marine aquariums and has a 20 mm blade. Ideal for cutting through coral or for fragging, propagation, and dead tissue removal, it is a great tool to have on hand. Perfectly suitable for use in freshwater applications, it also proves useful with cutting plant tissue. Made of high-quality surgical stainless steel, this scalpel is very durable and has a strong resistance to rust.