Accessories include: Two green gaskets for leak prevention; Four stainless steel heavy-duty toilet tank bolts, rubber washers, stainless steel washers, butterfly nuts , etc. are used to tightly connect the toilet water tank and bowl together and protect them. High quality materials: The gasket is made of high-quality rubber and has strong corrosion resistance; The toilet water tank bolts are made of 304 stainless steel, which has strong compression and corrosion resistance. Durable and long-lasting: High quality gasket and 5/16 * 3.15 inch toilet water tank bolts can ensure a long service life without easy damage, avoiding the trouble of frequent replacement. It can be purchased once and used for many years. Multiple protection: The black rubber washers and stainless steel gasket in the accessories can perfectly prevent the water tank and toilet wrist from coming into contact with metal screws, thus providing perfect protection. Easy Installation: The installation of accessories is simple and convenient, especially the specially designed butterfly nut, which can be easily installed and disassembled by hand without the need for any tools. No need for plumbers or electricians, saving you time and money. 3" Toilet Tank to Bowl Gasket Kit, Fits American Standard Champion 4 Toilet Parts AS738756-0070A, 5/16 * 3.15" Stainless Steel Heavy Duty Rustproof Bolts Kit for Most 3 Inch Flush Valve Opening Tank