CONTENT: 2pc 17mm NENESUPPLY Silicone Flange Inserts compatible with 24mm of Elvie flange, Elvie Stride flange, Momcozy flange, Medela flange (Personalfit Flex and Freestyle Hands-Free), Spectra flange, Willow flange, Willow Go flange, and Motif Luna flange. Reduce 24mm to 17mm. MADE BY NENESUPPLY. Compatible with Elvie pump parts accessories and Willow pump parts. COMPATIBLE PUMPS: Work with 24mm FLANGES of most breast pumps in the market. See product photo for illustrations. AVAILABLE IN 15, 17, 19, 21mm. MADE FROM SOFT SILICONE: Soft silicone makes pumping more comfortable. Reduce flange funnel to 17mm. Suitable for moms with smaller nipples. Correct flange sizes make pumping more efficient. NO LOSS OF SUCTION- Embeded sealing circles creates a complete seal. EASY TO INSTALL & REMOVE - Easy to push in and pull out the inserts. Hassle-free EASY TO CLEAN: Dishwasher safe (top rack only). BPA and DEHP Free. Comply with EU and USA regulations for materials that contact food. Tested by independent labs for quality and safety. Flange Insert