Prefectly fit and, even none plumbers can install it Toilet bolts make of stainless Steels, which is resistant, rustproof and hard to break or deforms Black gaskets is make of rubber, waterproof The toilet Tanks gaskets repair kits adopts quick installation structure Fixed leaky Tanks with this toilet Tanks replacement kits The long Nut at the bottom is used to avoid shifting or movement, have better stability and the rubber washers on both side secure and seal the toilet Tanks to the bowl, water leakage : You just need to install it with a screwdriver ( Excluding), simply remove break bolts, clean around the area and then fit the our bolts, Manufacturer: Xjdzineq