The Tunze Skimmer Holiday Cup 9004.145 replaces the cup on the Tunze Comline DOC Skimmer 9012 and the Tunze Comline DOC Skimmer 9012. This Cup provides an outlet for the skimmate that can be connected with the provided hose to a bucket or other receptacle. Includes 78.7" silicone hose. A great choice for aquariums during holiday/vacation, for professional systems, larger aquariums, etc.