Set includes one pair each of hard plastic Medium, Large, and X-Large shields plus a pair of adapters for Ameda pumps. These are not silicone. These fit the Ameda Mya Joy insurance pumps!
The Large Sets cover a nipple size range from 24mm to 40mm.
No other parts needed, use your Ameda bottles, backflow protector, and valves.
This set will also work for all Medela, Lansinoh, and Hygeia pumps.