Screw rod specification: 3" Locking Swivel Casters, 5/16" -18UNC x 1-1/2" (Stem Diameter 5/16", Stem Length 1-1/2") Threaded Stem Casters, Casters with No Noise Set of 4 Castors.

Stable construction: Housing made of heavy duty steel for high load, the max capacity set of 4 wheels is up to 600lbs. Side locking brake can hold the equipment firmly in place to reduce accidents.

Non-marring thermoplastic rubber wheels: non-toxic and environmentally friendly, resists most solvents. Shock absorbing cushioned ride offers floor protection and quiet rolling operation.

Multipurpose: These caster wheels can be placed on workbenches, instrument cases, art tables, and so much more. Whatever your workplace needs assistance making mobile, our wheels for cart are a quick fix. Equipped with 360 degree swivel head, caster wheels can respond immediately to changes in direction.

Quality assurance: Please confirm the size of the stem before purchasing, so as to avoid buying mistakes. 1 year repair service, 30 days money back assurance, costless replacement, no questions asked.