is called outer spherical ball bearing.
Bearing material: chrome steel/440 stainless steel
Housing material: cast iron/304 stainless steel/PBT plastic
Different bearing material can be combined with different housing material
Color: green/blue/white/silver
Housing material: cast iron/304 stainless steel/PBT plastic
Different bearing material can be combined with different housing material
Color: green/blue/white/silver