Ball Caster Roller Transfer Bearing - Ball Transfer Unit Appliance Caster Transmission 1 Inch M12,Stud Mounted,Thread Stem,Nylon & Carbon Steel,550 Lbs Total Load Capacity,Set of 4
Material: mail ball is nylon, shell is carbon steel.
Dimension: Please see the detailed dimensions from the left pictures.
Load Capacity:138 lbs per unit, max. load capacity is 150 lbs per unit.
Net Weight: 0.49 lbs per unit
Application: It's better to be used indoor and on smooth surface. Its noise is low and it can reduce scratches on objects. Please don't impact them because of nylon.