【4 Piece Toilet Seat Set】- The Toilet Seat includes 2 pairs of toilet seat fittings. 【Product Size】- The toilet glasses is made with silicone sleeve and stainless steel screw, silicone sleeve length 40mm, width 18mm, silicone seal diameter 28mm, screw length 48mm, screw length 5.7mm in diameter, the seal 14mm. 【Universal Size】 - The screws are universal for the toilet when they fit through standard toilet holes and/or with blind holes . Once tightened, the rubber expands and completely blocks the shelf. 【Easy To Install】 - The toilet seat fixings are very simple to assemble and truly universal, installed in a few seconds without problems. 【Excellent Material】 - The seat holder glasses have high quality with smooth surface. Good hardness of the screw, not easy to break.