Neoperl Coin Slot Aerator Laminar Maximum Flow M24x1

You don't need any special tools here, it's meant to be removed with a coin in the slot across the middle You're right about the vinegar,

Brand, American Standard Flow Rate, Product Type, Coin Slot Used on, Kensett Lavatory Faucet Commonly Purchased with This Item

coin slot machines Official Stockists of Bristan Coin-Slot Aerator - 00001

coin strike slot Versatile Use:Suitable for not only use in both kitchen and bathroom sinks, this foam coin slot aerator also serves as a reliable replacement for faucet flow