Dual 1/2 inch Random Flow eductor /Generator with 3/4 inch bulkhead for diy Aquarium

3DReeF 3/4inch Bulkhead with 2x 1/2inch Flow Generator Locline unit .It generates a Random Flow pattern in your aquarium..Suited to install with 3/4 inch hole in the glass and a 22 mm internal hose diameter. Easy to install. Available in 3 main colours Black,Neon green and orange.Neon green colour glow below Uv light.