There should be a left side and a right side because of the shower curtain clips. I got two right sides. Not sure if this is a mistake or they are just two cheap to make a left and right side. I'm going to use them anyway and just not clip the left side since the clip is on the outside of the baffle.

Good quality product very easy to install. Feels an operates like a high end fixture

This seemed like the perfect replacement, everything fitted great in my peerless bathroom sink faucets except there was an extra bar in the white plastic part that stopped the faucet handle from sitting back completely. So all these parts are great if you needed to replace seals etc but the top white plastic part of the cartridge did not fit my peerless faucet.

Perfect fit for an older version of same faucet.
(Oddly it did not include the sink stopper bar, but was able to use the old one.)