Quality of Materials Made of rubber and 304 stainless steel, the rubber bung is more resistant to dirt and abrasion, expands better and is less likely to break. More flexible and durable than other plastic plugs. The metal screw under the rubber protection has good rust prevention, can be used for a long time. Delicate Design The rubber plugs have a threaded section at the bottom for you to push them directly into the hole at the top of the toilet bowl. No need to install the bolt on the other end of the screw. Convenient and time saving. Widely Used Specifically designed to hold toilet seat covers in place, fits most standard toilet seats with fixed top hinges. The Package Includes 1 pair of toilet lid hinge fittings including bolts and expansion rubber nuts, washers. Comes with all necessary accessories and can be easily assembled in minutes. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference of light and display, there will be a certain color difference, depending on the physical object received Delivery Quantity: (according to the main image)