100% brand new and high quality.Super diffuse efficiency to get the best CO2 dissolved effect.Designed for screw lock on the CO2 tube, no need to worry the tube loose off by the pressure and caused damage.Adopt fine ceramic that ensures CO2 is dissolved into water with highest efficiency.Super -hole atomization.U type air inlet bubble.Quantity: 2 PcInvisible check valvecolour: Black+KhakiMaterial: Ceramic+Plasticsize: 5.5 x 3 x 2.5cmPackage Contents:2 x Nebulizer refiner with sucker atomizerOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.