Bottle Adapter Medium, 6/pk

Seachem bottle stoppers come in two sizes and allow for seamless connection between dosing pump tubes and any Seachem or Aquavitro bottles ranging in capacity from 50 ml to 1 liter, as well as many other common supplement bottles (from 24 mm to 28 mm) in the market. They are ideal for use with Aquavitro Sentia dosing tubes. They fit tube sizes up to OD 0.192 inches/4.88 mm. Small bottle stoppers: fit from 50 ml to 500 ml (24 mm) Medium bottle stoppers: fit 1 liter (28 mm)