BPA-free breast shield set for use with all Ameda electric breast pumpsnFor use with Ameda Breast Pumps HygieniKit for Purely Yours, Elite, and SMB breast pumps.nProvides mothers with both Medium (28.5 mm) and Large (30.5 mm) size flanges in one box.nIncludes: Reducing Insert for Medium, 28.5 mm, BPA free x2 +Large flange, 30.5mm, BPA free x2nAllows for single or dual pumpingnHYGIENIKIT SYS FOR BREAST PUMP Size: DUAL