Jardin Aquarium Rubber Flexible Air Curtain Diffuser Tubing Hose, 17-1/2-Inch, Black Product name: air curtain bubble Inlet connector: inside dia: 2 2mm/0 087"; outside dia: 5 8mm/0 23" Pipe Dia.: 11mm/0. 43" Pipe Length: 45cm/17 1/2" Color: Black Net Weight: 55g;Used for: Aquarium, Fish Tank; Material: Rubber Package content: 1 x air curtain bubble