Sonline Aquarium Ponds Green Outlet 6" Blue Air Stone Bar 2 Pcs Product Name: Aquarium Air Stone Suitable for: Tank, Aquarium; Shaped: Bar Design; Material: Mineral, Plastic Outlet Connector Diameter: 6mm/ 0.24" (max.); Stone Length: 15cm/ 6"; Weight: 73g Total Size (Approx): 16.2 x 2.1 x 1.3cm/ 6.4" x 0.8" x 0.5" (L*W*T); Color: Green & Blue Packag: 2 x Aquarium Air Stone