MATERIALS - Expandable ball (black rubber), screws (stainless steel), and cap (stainless steel). NOTICE: Please refer to the product dimensions in the second image before purchasing. ELEGANT - Modern toilet seat fittings with a bright polish that enhances the lifespan of your toilet. They can be used for a long time without easily becoming damaged or rusted. Perfect replacement for old toilet seat fixings. RUBBER CAPS - The rubber caps slide perfectly into the holes and fit snugly when the screws are tightened. EASY INSTALLATION - Includes all necessary hardware and installs easily; you will only need a screwdriver. UNIVERSAL USE - Expandable ball diameter: 1.8 cm (unexpanded). Length: 4 cm; Suitable for 14-16 mm holes in 2-inch toilet seats. Ideal for replacing broken or old toilet seat hinges. Fits most standard toilet seats with a top-fixing hinge.