Durable ConstructionMade of thickened ABS plastic with electroplating process, resistant to corrosion, acid, and wear for long-lasting use. Dual Flush MechanismFeatures a dual-button design for efficient water management, allowing users to choose between full and partial flush options. High-Quality ComponentsEquipped with a high-elasticity stainless steel spring that ensures smooth operation and prevents jamming. Easy InstallationComes with reinforced, deep threads to prevent cracking and ensure a secure fit during installation. Customizable LengthExtended screw rod can be cut to size, accommodating different toilet tank depths for a perfect fit. Specifications: Material: ABS plastic Spring: Stainless steel Installation Thread Width: 3.8cm Installation Caliber: 3.8-4.5cm