Suitable for: 1.9 Inch (48 mm) tank hole. Dual flush function. Compatible with TOTO, American Standard, KOHLER, Twfords, Armitage Shanks, Geberit, Siamp, Wirquin, Cookr & Lewis. Nice Look : Using the high-end plating technology, multi-layer plating process, high brightness and ultra-smooth surface, long-lasting. Easy Adjustion :The total length of the torsion bar is 10CM, the rotation length can be shortened and extended. You can adjust the length according to your needs. Wide Compatibility: fits most dual flush valve and 48 mm dual flush toilets with cistern lid, compatible with Glacier Bay, AquaSource, Project Source, and more Useful: 48 mm toilet flush buttons with adjustable rods and anti slip rubber feet; Toilet water saving replacement for family use DURABLE MATERIAL: hard wearing ABS with electroplated chrome finish, 304 stainless steel spring, durable and full of elasticity; Rods and nuts are of quality plastic