Toilet Seat Top Fixing Screws Toilet Seat Hinges Blind Hole Fixings Expanding Rubber Toilet Seats Nuts Hinges Replacement Tightening Kit Wc Blind Hol Material - Black Rubber / ABS Plastic/ Stainless Steel. Made from strong metal hinges and bolts, better than most plastic fixtures.Expansion ball diameter: 1.8 cm/ 0.7 inch (unexpanded state). Length: 4.8cm/1.57 inch.Supplied with 4 soft plastic washers. Plastic washers will not rust, better than metal ones. When you tighten the bolts the washers crush down into the holes, you need to be careful not to tight the bolt so much it pushes through the washer.The rubber grommets in the kit have a threaded section so you can just push them into the holes in the top of the toilet pan and when you tighten the screw it expands and tightens itself into the hole, without the need of a bolt on the other end of the screw. The round hinge plate make this extra sturdy and ideal.If your toilet seat kept moving, please use these toilet seat fixing screws to replace the useless plastic inserts supplied with a new top fix seat.Product :Feature:Quality rubber,Smooth surfaceExcellent toughness, Not easy to breakSpecifications:Material: Stainless steel+ Silicon+ RubbeColor: White + blackWeight: 68gPackage included:8 x Toilet Seat Fixings