NEOPERL 1.5 GPM Dual-Thread Water-Saving Faucet Aerator 37.0086.98 - The Home Depot
Flow Control
Flow regulators for retrofitting at home
Neoperl Cache Size Swivel Adapter. Perfect for Ikea, Grohe and Kludi faucet | eBay
Neoperl 13 0000 5 Standard Flow Cache Perlator HC Aerator, Tom Thumb Size, 2.2 GPM, Aerated Stream, M16.5 x 1 Threads Bundle with Aerator Key (2 Items)
62% water saving tap aerator Neoperl 3.8 lpm, easy limescale removal function | eBay