... gasket kits 2.keep the toilet tank solidly attached and prevent leaks between the tank and the bowl. Tank to bowl gasket kits Itemtank ... ,M6-M12 copper Screws,Lock Nuts,steel Gaskets,rubber GasketsApplication Toilet bowl of TOTO,AMERICAN STANDARD,ROCA,INAX,KOHLERItemNameQty/pcSpecificationMaterial1Butterfly Nut ... according to ASTM, DIN, SAE,VDA6.1, UL,FDA,JIS. Tank to bowl gasket kits