Hey￡? come on! What we particularly recommend you is this New High-quality CO2 Diffuser White which will not let you down! Made of high-quality material and with fine workmanship￡? this CO2 diffuser is rather practical and durable in use. Suitable for fish bowl and fish tank￡? it could effectively diffuser the CO2￡? which could ensure the vitality of fish. Besides￡? with small size and light wieght￡? this CO2 diffuser is very easy to install and use. Never miss it!                                    Features            New and never usedMade of high quality material￡? durable in usePractical and convenient to useSuitable for fish bowl and fish tankReusable and easy to keep cleanCombined with a cupula￡? easy to install                                                            Specifications            Condition: NewMaterial: PlasticColor: WhiteDiameter: Big Hole: 0.79in / 2.0cm<br> Small Hole: 0.14in / 0.35cmDimensions: (2.68 x 1.18)" / (6.8 x 3.0)cm (L x W)Weight: 0.42 oz / 12 g                                                            Package Includes            1 x CO2 Diffuser