4* Brass flat washers 4* Black rubber washers 2Brass nuts 2Brass bolts 2 * Extra Long Brass Lock Nuts 1.Quick and Easy Installation: The extra long nut on the bottom side (bottom lock) is ideal for easy installation. And as locking nuts to prevent shifting. Tank to Bowl Bolts: Large rubber grommets on top and bottom sides. This secures and seals the toilet tank to the bowl. 3.Application: Bolts, screws and gaskets are what you need to install and secure your toilet. 4.Material: Bolts are solid brass and all gaskets are high quality rubber.