12 Pcs Ceramic Bearing Balls, 4 mm/0.157 in Zirconium Oxide Solid Round Balls…
Material: Zirconia Ceramic (ZrO2). ✅ Valve: Core parts of valve balls, check valves and flow valves, corrosion resistance suitable for and petroleum scenarios;.
Material: Zirconia Ceramic (ZrO2). ✅ Valve: Core parts of valve balls, check valves and flow valves, corrosion resistance suitable for and petroleum scenarios;.