Everyone needs an extra set...a custom packaged Medela 24mm flange, one adapter, one valve, and one membrane.   All genuine Medela parts, so there is no problem with flanges that fit the adapter poorly or valves and membranes that fall off! Note:   Photo shows a 1 part flange.   Package contains 2 part.

• One 24mm flange
• One flange adapter
• One yellow valve
• One white membrane

Genuine Medela parts.