uxcell Plastic Duckbill Nozzle Water Outlet Return Pipe Plumbing Fitting for Aquarium 2 Pcs Package Content: 2 Pcs x Aquarium Nozzles; Total Size: 90 x 30 x 27mm/3.5" x 1.18" x 1.06"(L*W*T) Wide use at Aquarium, fish tank and pump. Good function: it can freely adjust the direction of flow. Use with circulating pump or return pipe. Nozzle Size: 30 x 7mm/1.18" x 0.28"(L*W);Thread Outside Diameter: 21mm/0.83"