Wheel dia:100mm,150mm,200mm Load capacity:from 350kg to 550kg Caster material: Steel core polyurethane wheel with ball bearing or roller bearing,Solid steel welded construction,double ball bearing housing,zinc painted Matching with different fittings such as swivel with brake or without brake, or fixed plate, Steel core polyurethane caster are available Chrome, zinc or nickel plating available Caster with swivel, fixed or with brakeplate fitting is available Applications:Loads reducing shock absorbing cart Assorted colors (optional)