Unbranded Poly Castor Wheel approx. 6" Od. x 2" Wide x 1/2" Id. wheel has ball bearing hub the hub width is a little over 2-1/2" the Od is slightly under 6" a little closer to 5-7/8" These are new take-off wheels I am they either came off a machine that was being modified or from maybe something the company was trying to build. They have shelf wear scratches and dust/dirt from sitting. This is surplus to a now closed factory that kept spare parts on the shelf the boxes/parts may show shelf wear and have dust on them. [Please Look at all the pictures they are part of the description] [B1-F1-R6-S2-4]