uxcell 10 Pcs 4mm Connector Blue Fish Tank Aquarium Bubble Airstone 25mm x 12mm</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Package Content: 10 Pcs x Aquarium Air Stone; Total Size: 13 x 9 x 2</li><li>Color: Blue; Material: Mineral， Plastic</li><li>Product Name: Aquarium Air Stone; Net Weight: 47g</li><li>Stone Size: 15 x 25mm/ 0.6" x 0.9"(D*H)</li><li>Connector Size: 4 x 3mm/ 0.15" x 0.13"(Outer Dia*Inner Dia)</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51MqNraXC6L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31e-kYYdzFL.jpg' noproxy></br>