Usage Tips:Package includes 4pcs(2 sets) black expansion rubber(with two expansion balls) with 2.99 inch long bolts and stainless steel washers(8pcs in total),Our toilet lid screws are suitable for universal toilet lids and can be installed on most TOTO, Kohler, American Standard toilets and other products With our toilet lid hinge screws, you don't need to tighten the screws from the bottom, the retractable rubber plug slides into the appropriate hole and squeezes into the hole when you tighten the bolt for a snug fit Easy to install,Easy to replace your old toilet seat in a few simple steps,these toilet seat bolts will make your life easier and more convenient Our toilet lid screws and bolts are solidly constructed for long-lasting use, with no slipping, no rusting, and a tight fit Made of excellent quality plastic, no obvious defects on the surface, not easy to deform or break, will not rust like metal bolts, more corrosion-resistant, can be matched with most toilet lid colours for a cleaner, tidier appearance Colour: Black Material: Metal + Rubber Package Contents: 4 x Toilet Seat Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.