Aquarium Water Hose Tube Adapter Converter Inlet 12mm to Outlet 16mm Part # AQ-ADAP-12T16
 
2 Plastic Adapters per package (One Pair)
 
Made from Durable Plastic Material
Crafted from high-intensity plastic
Connects  12mm to 16mm  /  1/2" Inch to 5/8" Inch hose 
50.8 mm  /  2" inch  Total Length