uxcell 10pcs Air Tube Multicolor Striped Plastic Airstone Diffuser for Aquarium Aquarium Air Stone; Stone Size : 13 x 25mm/0.5" x 0.9"(D*H) Connector Size : 4.5 x 2mm/0.17" x 0.07"(Outer Dia*Inner Dia);Total Length : 40mm/1.5" Material : Mineral, Plastic; Color : Blue Weight : 53g Package Contents : 10 Pcs x Aquarium Air Stone