... 20mm/23mm17mm/20mm/23mmokAppearance transparent glassy balltransparent glassy ballokPH valut 7±0.57±0.5okArsenic (As)mg/L≤0.005<0 ... 3. UF System,4. RO System,5. Purifiers,6. Dispenser,7. Filter Media,8. Water Filter,9. UV Sterilizer,10. Essential ... Housings,12. Filter Cartridges,13. Industrial RO Systems,14. Others.Features:1. Protects water systems in hotels, public buildings, private households and ...