These saved my pumping journey - much more comfortable fit than the flanges that came with my Specta pump. All parts from original kit included. https://pumpinpal.com/product/small-set-for-spectra-pumps/ Set includes one pair each of silicone X-Small, silicone Small, and hard plastic Medium shields, plus a pair of adapters for Spectra, Cimilre, Ameda Mya, and Motif Luna pumps. These do not fit the Ameda Mya Joy! No other parts needed, use your Spectra bottles, backflow protector, and valves. The Small Set covers a nipple size range from 15mm to 25mm.