100% brand new and high quality. Super diffuse efficiency to get the 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 Micro-hole atomization. U type air inlet bubble. Quantity: 1 Pc Invisible check valve colour: Black+Khaki Material: Ceramic+Plastic size: 5.5*3*2.5cm Package Contents: 1*Nebulizer refiner with sucker atomizer Only the above package content, other products are not included. Note: Light shooting 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.