Saim Resin Stylish Driftwood Aquarium Fish Tank Terrarium Tree Root Plant Wood Decoration Quick Sand Landscape Ornament Comes with 1 bag of sand and airline tubing to creat quick sand decor scene.(requires air pump,Not Included, usually use a 8W power air pump.If the water level is above 50cm,requires air pump with 10-15W power) Must connect with air pump to create the running sand effect Sandblasted finish prevents water contamination, safe and non-toxic Resin material, long lasting in underwater or arid environments Measures about 7.5Inch Height 7.1Inch Width.(Note: Pls check the fourth and fifth picture for installation instruction, thanks)