uxcell Aquarium Pond Pump Air Bubble Disk Stone Aerator 10cm Dia White Color: White, Dark Gray; Package Content: 1 x Aquarium Bubble Air Stone Total Size: 10 x 7 x 1.2cm/ 4" x 2.8" x 0.47" (OD*Inner Dia*T); Material: Plastic, Stone Product Name: Aquarium Bubble Air Stone Net Weight: 54g Outlet Hole Diameter: 3mm/ 0.12"