Set includes one pair each of silicone X-Small, silicone Small, and hard plastic Medium shields, plus a pair of adapters for Ameda pumps. These do fit the Ameda Mya Joy insurance pump!
No other parts needed, use your Spectra bottles, backflow protector, and valves.
The Small and X-Small Silicone PumpinPals, with Elast+Assist Technology™ (EAT), help improve milk flow for moms with elastic breast tissue.