The Symphony Double Breast Pump kit contains everything needed for families to double pump with a Symphony breast pump. Medela researchers found that double pumping obtains 18% more milk on average, compared to single pumping. Contains a set of 24 mm PersonalFit™ breast shields and 150 mL collection containers (2). This breast pump set is sterile, making it ready to use right out of the packaging. 
(2) 24 mm PersonalFit(tm) Breast Shields 
(2) PersonalFit Connectors 
(2) Valves
(4) Membranes
(2) Symphony Membranes Caps and Protective Membranes 
(2) Tubing with Adapters 
(2) 150 mL Collection Containers 
(1) Instruction for Use Document