Features: brand new and high quality 2 Optional Style: Inner Diameter: 12mm/0.47" to 16mm/0.63", 16mm/0.63" to 22mm/0.87" (optional), meeting your need. Stainless Steel Material: Our aquarium pipe adapter adopt stainless steel material, wear and corrosion resistant, good performance, more reliable to use. Long Service Life: Reliable to use, long service life, not easy to damage, and you can use for long. Easy to Use: Just insert the hose into the adapter. Nice accessory for home aquarium. Applicable to all kinds of water pipe, hose transfer. Specifications: Material: Stainless Steel Color: Silver Style: 12mm to 16mm (I.D.)/16mm to 22mm (I.D.) Size (Approx.): As Pictures Show Weight (Approx.): 12-16: 4g 16-22: 65g Package Includes: 1 Piece Aquarium Hose Fitting Connector (2 Style) note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!