The nexus 320 lid from evolution aqua has been designed to perfectly cover the top of the nexus 320 and older models. Br br the design of the lid has been developed by experts at evolution aqua's head quarters and combines the very highest quality materials with the brand's undoubtable knowledge within pond equipment manufacture. Br br the evolution aqua nexus 320 lid is developed from durable plastic for a robust finish and is also uv resistant. The innovative lid keeps light, leaves and other debris from entering the filter to ensure superb running of the nexus 320. Br br the evolution aqua nexus 320 lid is also very lightweight and melds into the design of the nexus 320 effortlessly, helping to enhance optimum efficiency of the filter whilst maintaining a smart and sleek aesthetic.