Feature highlights:Micro Small Size Carbon Steel Balls in 0.3mm, 0.35mm, and 0.4mm sizes are ideal for precision applications like automotive parts, linear motion guides, and industrial machinery. Manufactured from AISI1010 material with a hardness of HRC58-62, these bearing balls ensure durability and high performance. Free samples available, with a 1-year warranty and reliable quality inspection methods including optical sorting and visual checks.