Hi guys, can anyone point me in the right direction for some heavy duty, low profile swivel casters ? I have done a search but can't seem to come up with anything suitable.
I have a large storage bench which I can pull around the workshop to wherever I am working, and this in turn needs to slide under my main workbench when not in use. Like many, space in my workshop is hard to find.The ones I have used in the past have worked ok for a while but usually end up collapsing through time.

Ideally they cannot be any higher than 90mm in total, I have used single wheels in the past but am now looking to use the twin wheel type. If anyone has used these type and are happy with them, I'd be grateful for any info.

Thanks in advance guys.