... , Al, Copper, etcSurface treatmentZinc, Copper Nickel, Chrome, Tin, etc.ProcessAutomatic LatheOuter DiaØ1.0-20 mmUsageAutomotive/Car Thermostat ... 's demands)2. Surface finish: Zinc, Nickel, Chrome, Tin, Silver, Copper, Gold Plated, Painting, Anodizing Heat treatment, ... is used on the electric motor, water heater tube, cartridge heater tube, temperature controller precision hardware, motor controller PCB ...