Dymax Crystal Lily Pipe is a set of inflow and outflow pipes made from high-quality quartz glass that provides excellent clarity for its appearance as well as durability in its use. Quartz glass also has other properties such as endurance and hardness. Each part of the product is handcrafted with superb craftsmanship technology and the highest quality selection through strict quality control. It is an essential and vital item for any professional aquarium.