1. POM Toilet Seat Bolts The toilet seat bolts are made of POM with strength and wear resistance. With a rubber seal and a POM seal, they effectively prevent loosening and water leakage, ensuring stable installation and sealing. 2. Flush Valve Gasket The flush valve gasket is made of soft, flexible rubber, preventing water leakage and reducing vibration noise. Available in two sizes (S and M), it adapts to different toilet tank installation needs. 3. 4 Sets Options The toilet tanktobowl seal coupling kit offers versatile combinations to meet various installation scenarios. Set 1: A pair of toilet seat screws Set 2: An Ssize flush valve seal Set 3: A pair of toilet seat screws an Ssize flush valve seal Set 4: An Msize flush valve seal 4. Threaded Connection The toilet seat bolts feature a precisionthreaded connection structure, ensuring a tight fit between the tank and toilet floor. Installation is simple and convenient, while also providing a solid, reliable connection that minimizes loosening over time.