Adjustable liquid dispensers are widely used in daily analytical work in laboratories. Featuring a unique design, high-quality materials, and reliable construction, this product is designed for precise liquid handling. Suitable for scientific research institutes, inspection departments, and accurate measurement of liquids, including solutions, acids, reagents, and biochemical samples. The threaded outlet pipe must be securely tightened into the dispenser body to prevent leakage or ejection of corrosive samples during use. Always wear protective glasses when handling hazardous liquids to avoid eye exposure. Usage: 1. Set the quantitative knob to the desired scale, lift it up, and press down slowly. 2. Use the dispenser at normal room temperature. Allow freshly prepared acid or base solutions to cool before use. 3. This dispenser can be directly installed on most 500 mL screw-top bottles with a 35 mm diameter opening. A GL45 adapter allows compatibility with 1000 mL reagent bottles. 4. Before each use, purge air from the suction and outlet pipes to ensure accurate dispensing. Specifications: Capacity: 5–25 mL Accuracy: ±0.7 mL Minimum graduation: 1 mL Compatibility: 500 mL and 1000 mL bottles (screw cap, approx. 35 mm diameter) – bottle not included Applications: Petrochemical, dye, and environmental protection industries Precautions: Not suitable for use with hydrofluoric acid or strong bases. Note: Product design may be updated periodically. Actual product may vary slightly in appearance or color. Please consider this before ordering if specific color or appearance is required. Color: As shown Material: Plastic Package Contents: 1 × Adjustable dosing device (Other items not included) Note: Lighting and display settings may cause slight color differences between the image and the actual item. Measurement tolerance: ±1–3 cm