Medela Swing Maxi Flex Double Electric Beast Pump. Both sizes cup included 21mm (unused) and 24 mm (used). It is a closed circuit pump so breast milk is not in contact with any pipes. Only with cups and bottle which are easy to sterilise. Its power and battery operated. This item is in the category "Baby\Baby Feeding\Breastfeeding/Nursing\Electric Breast Pumps". The seller is "stern_3952" and is located in this country: GB. This item can be shipped to United Kingdom.