If you’re using narrow necked bottles with our  wide neck shield, you can use these adapters so that you can pump directly into your bottles. For use with our wide neck shields to make them compatible with standard/narrow neck bottles such as Medela, Dr Brown, etc. **PLEASE NOTE***This is a single adapter. For double pumping, you will need to order 2 adapters. Includes: 1 adapter Spectra #mm012364