Review on Pfister 974 035 Single Ceramic Cartridge by Esvin Hopuhnopuhlis

Perfect replacement for a disc cartridge in a leaking kitchen faucet. It's also a good idea to purchase a metal retaining ring (sold separately) instead of the plastic retaining ring that Price Pfister uses for the original faucet. It is impossible to remove the plastic retaining ring without damaging it. Note that Revain also offers the cheaper Price Pfister ceramic disc cartridge. It looks identical but appears to have a part number variant. I'm not sure what the difference is between these two parts. Judging by the reviews, both work.