Description: Material: 304 Stainless Steel To connect and convert aquarium hose. With hose fasten node to prevent chance of hose loose. 3 types available: 12mm/16mm adapter; 16mm/22mm adapter; U shape connector. Great kits for your aquarium tank! Specification: 12/16mm Adapter Size : Approx. 5cm/1.97 inch 16/22mm Adapter Size: Approx. 5cm/ 1.97 inch U Shape Connector Size: Approx. 4x3cm/1.57x1.18 inch (LxW) U Shape Connector fit 4mm/0.16 inch internal diameter pipe Package Includes: 1 Piece Connector (2 Pack) Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color of the pictures and the actual item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.