uxcell Aquarium Fish Tank 16-Way O2 Valve, 5.8mm Product Name : 16 Way O2 Valve; Material : Plastic Size : 240 x 60mm/9.4" x 2.4"(L*W); Inlet Connector Dia(Approx.) : 9mm/0.36" Each Branch Outer Dia(Approx.) : 5.8mm/0.23";Color : White Weight : 35g Package Included : 1x O2 Valve