Jardin Mineral Air Tube Release Bubbles 10-Piece Air Stones for Aquarium, 5mm, Dark Gray Product Name : Aquarium Bubbles Air stone; Suitable for : Fish Tank, Aquarium Design : Cylinder Shaped; Material : Mineral, Plastic Fit Air Tube : 5mm/0.2"; Air Stone Size(excluded connector) : 26 x 13mm/1" x 0.53"(L x W) Total Length : 41mm/1.6"; Color : Dark Gray, Black Weight : 55g; Package : 10 x Aquarium Bubbles Air stone