IVDChina Full/Hybrid Ceramic Zirconium Silicon Carbide/Nitride Si3n4 Zro2 Double Row Self Aligning Self-Aligning Ball Bearings with PTFE/Peek/Pi Cage/Retainer, Find details about China Silicon Bearing, Nitride Bearings from Full/Hybrid Ceramic Zirconium Silicon Carbide/Nitride Si3n4 Zro2 Double Row Self Aligning Self-Aligning Ball Bearings with PTFE/Peek/Pi Cage/Retainer