TOTO THY582N and THY552RR gasket and spring only for 1 unit. Brand Name: THY582N and THY552RR packet for 1 unit. Model number: 5J00028 x 2 pcs = (64202,72601,93260ER) x 2 pcs Compatible faucet model number: THY A single lever combination faucet that uses a 582N (lift and discharge) cartridge, a faucet that uses THY552RR (lower discharge), a faucet that uses THYF7R (lower discharge) and a faucet with a cartridge using THY566S (lower discharge water). To distinguish between THY582N and THYF7R is to remove the handle only. Then you can see the square part of the handle at the top of the cartridge, so you can judge whether the material is metal (=THY582N... color silver) or resin (=THYF7R... color is white). The difference between THY552RR and THY566S, if you remove the handle as above, the top diameter of the cartridge is about 1.7 inches (43 mm) is not suitable for THY566S= and approximately 1.3 inches (33 mm) is THY552RRR= compatible. In the event of a bad water stop for a single lever combination faucet, the cartridge is actually replaced, but this gasket set is often corrected by itself and is worth to do it.