4pcs 4 Inch 100mm Silent Heavy Duty  Rubber Swivel Caster Wheels 

Features:

6mm Thick steel bracket
All joints use double ball bearings
Metallic bearing ball, 360-degree swivel top plate
Non-marking rubber wheel, Silent and smooth rolling
Efficient brake

Specifications:

Material: High-quality rubber, Galvanised steel
Type: Fixed wheel/Swivel wheel/brake wheel
Wheel Diameter: 100mm
Wheel width (approx.): 50mm
Plate dimension: 113mm x 98mm
Bottom hole distance: 85mmx75mm
Mounting Height: 135mm
Load capacity(4 wheels): 450kg
Weight Fixed x 2+ Brake x 2: 7.24kg
Weight Fixed x 2+ Swivel x 2: 6.4kg

Package included:

4pcs Caster Wheels