Original Spare Part Waterproof Tube for Sunsun Hw-304 A/B Hw-404 A/B Uv Filter by Sun Microsystems Go to amazon.com Related posts Top 13 sunsun filter parts for 2022 FeaturesunsunHW-304HW-404canisteraquarium DescriptionFeatures The Original spare part waterproof tube for sunsun HW-304 A/B HW404 A/B UV filter