Compatible with SpectraS1,S2 9 PLUS/Motif Luna/Amada Mya Breastpumps. Contains 2pc widemouth flanges/Shields Material of flange:PP,BPA FREE The flanges can be sanitized with water steam or boiling water or microwave-steam DIFFERENT FLANGE SIZE AVAILABLE:13mm,14mm,15mm,16mm,17mm,18mm,19mm,20mm,21mm,22mm,23mm,24mm,25mm,26mm,27mm,28mm,29mm,30mm