Material: The shower flow restrictor is made of POM material with a chrome-plated exterior for enhanced corrosion resistance. Super water-saving function: The shower restrictor reduces water flow by 30%–80%. Adjust the restrictor by tightening or loosening to control water flow and conserve water. This water-saving device features an anti-clogging design for extended service life and easy maintenance. Removable water saver: Install or remove the water saver quickly in seconds without tools by simply tightening or loosening. Wide compatibility: Suitable for installation in bathtub faucets or shower faucets. Ideal for use in bathrooms, showers, toilets, and kitchens. Product benefits: The shower flow restrictor helps reduce water flow to as low as 4 liters per minute. Features a special coating for reliable performance in shower and bathtub applications. Designed to help lower annual water consumption. Package includes: 3 different flow control inserts to meet various needs. Green insert reduces flow to 4 L/min. Blue insert reduces flow to 6 L/min. Yellow insert reduces flow to 9 L/min. Specifications: Material: Chrome-plated brass. Thread size: 1/2 inch. Fits standard shower faucets. Package includes: 1 x Copper fitting, 1 x Washer, 1 x Green water-saving insert, 1 x Blue water-saving insert, 1 x Yellow water-saving insert.