4 units per pack.

Features:

• Works with AVENT reusable storage and VIA

  Converters allow you to express directly into AVENT Bottles or VIA Cups. Insert a sealing disc or screw on lid to store breast milk in the fridge or freezer. Simply replace sealing disc or lid with an AVENT Teat for feeding - no need to transfer milk.

• Easily adapts breast pumps to fit AVENT System

This conversion kit works with most manual and single or double electric pumps on the market.