Original Spare Part Waterproof Tube for Sunsun Hw-303b Hw-403b Uv Filter by Sun Microsystems Go to amazon.com Related posts Top 13 sunsun filter parts for 2022 FeaturesunsunHW-303HW-403canisteraquarium DescriptionFeatures The Original spare part waterproof tube for sunsun HW-303B HW403B UV filter just replacement is ok