Jardin Aquarium Fish Tank Air Curtain Bubble Wall, 45cm This porous rubber hose with good softness, and any shapes required can be made It's bubble disperse equally and supply is excellent It measures approx. 45cm long, and 1. 4cm in diameter. Inlet Connector Size: approx. 2mm internal, 5mm external. Weight: 81g; package included:: 1 x 45cm air curtain