Dual 1/2 inch Random Flow Generator with 3/4 inch thread

3DReeF Dual Random Flow eductor Generator .It generates a Random Flow pattern in your aquarium. the thread is 3/4 inch and divides into 2x 1/2 inches Flow Eductors. Available in 3 main colours Black,Neon green and orange.Neon green colour glow below Uv light.