Features: * fresh and high-quality *Made of high-quality material, durable and reasonable to apply *Excellent Material: Expandable ball is product of black rubber, white screw with strong brass thread within is fabricated from nylon material, lengthy screws and gaskets are made of 304 stainless steel, mushy washers are fabricated from ABS Plastic. Sturdy and durable, rustproof and corrosion resistant, higher than most plastic fixtures. *Non-rust Design: Plastic washers will not rust, larger than metal ones. When you tighten the bolts the washers crush down into the holes, you have to be cautious to not tight the bolt lots it pushes throughout the washer. Screw has steady brass thread within can antiskid and antirust. *Easy To Use: Put the toilet seat bolts in the toilet mounting holes. The rubber grommets 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, with out the need of a bolt at the different end of the screw. Convenience and saving time. *Universal : 2 Pairs / 4 Pcs lavatory seat replacement ingredients kit. If your toilet seat kept moving, please use these rest room seat solving screws to switch the useless plastic inserts provided with a fresh height repair seat. *Toilet lid seat fittings appropriate for most of regular lavatory seat with top repair hinges ,the gap of toilet seats from 14 to 18mm. Specifications: Size: Black growth ball diameter: 1 cm/ zero inch (unexpanded state). Length: 4cm/1 inch. White screw size: 4 * 0. Nylon growth nut size: 3 * 1. Washer diameter: 1. Package Contents: 4 Pcs bathroom seat replacement components kit Note: 1. The real coloration of the article may possibly even be slightly diverse from the photographs proven on online page attributable to many aspects resembling brightness of your visible show unit and light brightness. 2. Please allow slight guide size deviation for the data.