Modular plumbing sets offer flexible controls to direct water flow in shelters, reef tanks. You can create routes however you like. Suitable for aquarium. Our platypus are made of high quality plastic material, which is light, strong and easy to clean. Easily organize filtration systems between tanks. Number of specifications: 1 material: plastic Size: Large: inner diameter: 1.9 cm, outer diameter: 2 .2 cm, duckbill (L x W): 7.5 x 5 cm Color: Black Note Since most products are handmade, there may be inevitable slight differences between collections, but they won’t change much to your aesthetic taste. Package 1 duckbill