1. Weight: 47g/piece 2. Size: 58 20mm/piece 3. Material: Alloy 4. Scope of application: suitable for most water purifiers, four-to-two metal ball valves 5. Purpose: Special reducing ball valve for connecting household tap water and water purifier 6. Sealing performance: nut tightening and sealing 7. Thread specifications: 4 points of external thread (1/2 ) 8. Applicable water temperature: 5-45 degrees Celsius 9. Features: beautiful and practical, simple and convenient to operate, time-saving and labor-saving, good air tightness, high precision, safety and reliability, clear thread, strong water leakage, durable