Faucet Aerator

I was sent the incorrect size I phoned and told the chap who had done the order I was looking for a 19mm as opposed to the 21mm that was sent. He said he would speak to his boss & get back to me. I am still waiting!!!!

I'm not satisfied with the product because it's different as on the website. The website advertise a metal type aerator and the ones I received was plastic