Uxcell 3-in-1 Aquarium CO2 Atomizer Bubble Counter, Clear/Black Product Name : 3 in 1 CO2 Atomizer; Use for : Aquarium, Fish Tank Color : Clear, Black; Material : Plastic Hole Outer Diameter : 5.4mm/0.21"; Overall Size : 65 x 35mm/2.6" x 1.4"(L*Max. D) Suction Cup Dia. : 3cm/1.2"; Weight : 25g Package Contents : 1 x 3 in 1 CO2 Atomizer,1 x Suction Cup