uxcell Rubber Aquarium Fish Tank Pump Air Bubble Wall Diffuser Bubble Aerator 30" Long It is an important instrument to successfully keep aquatic fish for respiration process. Total Size: Tube Length(Not Included Connector ): 75cm/ 30" Color: Black; Material: Rubber, Plastic; Net Weight: 100g Package Content: 1 x Aquarium Air Curtain;Product Name: Aquarium Air Curtain Connector Size: 4 x 2mm/ 0.16" x 0.08"(Outer Dia*Inner Dia); Tube Diameter: 10mm / 0.4"