What are you using them for?
Flightcase wheels could work for you?
http://www.ebay.co.uk/itm/HEAVY-DUTY-Flight-Case-Castors-4-Blue-Wheels-Caster-/370207447373
http://www.adamhall.com/en/Swivel_Castors.htm
Flightcase wheels could work for you?
http://www.ebay.co.uk/itm/HEAVY-DUTY-Flight-Case-Castors-4-Blue-Wheels-Caster-/370207447373
http://www.adamhall.com/en/Swivel_Castors.htm
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