Made from plastic and stainless steel, green environmental protection, durable and corrosion resistant. Adjustable flush volumes on full and save water by reducing the amount of water used with each flush. Half full, double drainage, to increases your toilet's efficiency. Design with rubber gasket, no more leaking issue in toilets. Useful cistern toilet repair kits. Only fit for connected toilets. Specification: Material: PlasticandStainless Steel Dual Flush Button Dia. approx. 7cm A: Drain Valve Height 18cm, Fill Valve Height: 24.5cm; Fit for Cistern height 18-24cm B: Drain Valve Height 24cm, Fill Valve Height: 29.5cm; Fit for Cistern height 25-30cm C: Drain Valve Height 20cm, Fill Valve Height: 29cm; Fit for Cistern height 20-24cm D: Drain Valve Height 18cm, Fill Valve Height: 27.5cm; Fit for Cistern height 18-23cm E: Drain Valve Height 24cm, Fill Valve Height: 24.5cm; Fit for Cistern height 24-29cm F: Drain Valve Height 28cm, Fill Valve Height: 24.5cm; Fit for Cistern height 28-34cm G: Drain Valve Height 28cm, Fill Valve Height: 27cm; Fit for Cistern height 28-36cm H: Drain Valve Height 20cm, Fill Valve Height: 29cm; Fit for Cistern height 20-26cm Package Includes: 1 Set Toilet Tank Kits Note: The product is shipped ramdomly, and the function is as same.