1.2GPM Faucet Replacement Part Insert Filter, Restrictor Aerator, 8 Pack(Blue+Black) 18.5Mm & 16.5Mm
https://www.vogueparade.com/shopping/EN/200066142/1/1005003165738024/12gpm-faucet-replacement-part-insert-filter-restrictor-aerator-8-packblue-black-185mm-and-165mm//