Youha Silicone Flange Inserts, 1 PairThe right flange fit makes the difference between a comfortable pump and a miserable one. These replacement silicone inserts are compatible across the Youha range pick your size, replace regularly, and keep every session comfortable and effective. Sizes 1321mm available Compatible with The INs, INs Gen2, The ONE & Express Cups Plus Food grade silicone Sold as a pair Replace every 3 months or at first sign of wear Pair with our Lila Jasmine lactation