Electroplated steel balls with nickel, zinc, gold, silver, copper-gold and colored finishes for surface protection, electrical conductivity, decorative hardware and engineering applications. Kangda lists plated steel ball bearings from 0.8 mm to 38 mm, including gold, silver, nickel and zinc versions. The category also includes 0.8 mm and 1.0 mm copper-gold balls, 10 mm to 20 mm balls for mining grinding bearings, and mirror-polished balls for Newton pendulums. These products are listed where metallic finish, dimensional accuracy and durability are required.
