15mm Steel ball casters on 1mm thick steel plate created from machine stamping. Can carry a much as 15 kg load. Exquisite workmanship, strong and lightweight, this caster is 30mm high round body, with a total weight of just 37g. Large steel ball is wrap around with as many as 40 small steel balls, making the main scroll ball rotation very smooth.
Fixed hole: 4mm
Fixed hole center distance: 40mm
Round body overall height: 20mm
Steel ball diameter: 15mm
The number of small steel ball : 40
Caster Weight: 37g
Load capacity: 15kg