Product name : aquarium air curtain; color : blue * Material: hard plastic;each air curtain length: 10 5cm/ 4 1" * Air Curtain Inner Diameter: 5mm/ 0. 02";Air Curtain External Diameter: 10mm/ 3. 9" * Net Weight : 47g * Package contents : 6 x small air curtains; 3 x suction cups; 5 x connectoers; 2 x stoppers; 2 x air inlet