Content:2pc 14mm flange insert,Reduce the 24mm/25mm shield nipple tunnel down to 13mm,The size is the begin of the tunnel not the end of the tunnel,Suitable for nipple diameter 11-13mm(after a pumping session). Compatible Pumps: Compatible With Spectra/motif Luna/medela/momcozy/ameda/zomee/tsrete/willow/elvie/tsrete/kmaier/hauture/bellababy/ncvi 24mm Flanges/Shields,also Fit Lansinoh 25mm Flange. Easy To Use: Easy To Install And Remove And Clean, Work With Most Handfree Bras. Bpa And Dehp Free, made of silicone material. Easy cleaning: wash Belmikal pump parts after each use with warm soapy water and rinse well.Can be sanitized with water steam, boiling water or microwave-steam bags. Different Flange Size Available:13mm,14mm,15mm,16mm,17mm,18mm,19mm,20mm,21mm.
Compatible with spectra breast pump 24mm,but not fit spectra caracup 24mm flange

also Compatible with Medela 24mm flange,elvie/willow/momcozy wearable breastpump 24mm flange。

It is necessary to push it into Nipple Tunnel as much as possible to make it fit.

DIFFERENT FLANGE INSERT SIZE AVAILABLE: 13mm,14mm,15mm,16mm,17mm,18mm,19mm,20mm,21mm MATERIAL DO NOT CONTAIN ANY BPA.Material of flange:silicone

About size：The size is the begin of the tunnel,not the end. Measure after installation, because the silicone is soft