The Kent STA-TITE is designed for universal pans and is made from the durable Tecnoplast thermoplastic material. This seat features durable plastic hinges that adjust to help achieve the perfect fit to your pan. This seat also features STA-TITE: the patented fixing system that always stays tight and takes the guesswork out of installation. The lower portion of the nut shears off when the proper tightness is reached, so you cannot over-tighten. Universal Toilet Seat. STA-TITE Fixing