VEVOR Deionized Water System for Car Wash, Spotless Car Wash Water System with 2 x 4L DI Resin, Bypass Valve & TDS Meter, Portable Sport-Free Water Deionizer Filter for Cars RVs WindowsSpot-free Car WashClean Faster and EasierHow to UseWide ApplicationFrequently Asked QuestionsEfficient Spot-Free Rinsing SystemWorking Temperature: 39-111℉ / 4-44℃,Item Model Number: PRS-TCXC-PT,Mixed-Bed Resin Volume: 2 x 1.06 gal /4 L,Inlet Working Pressure: 3-8.6 MPa,Product Dimensions: 18.31 x 14.96 x (33.07–37.01) in / 465 x 380 x (840–940) mm,Built-in Bypass Valve: Yes, Included ,Net Weight: 45.86 lbs / 20.8 kg