12" x 3" Red Polyurethane on Silver Cast Iron Core - 3,200 lbs Capacity per Wheel. CasterHQ's Red Polyurethane elastomer tread is chemically bonded to a silver cast iron core. Offers higher weight capacities while providing good floor protection and a smooth quiet rolling operation. Optional precision ball bearings bearings require less effort to start up and maintain a rolling load; they also generate less friction heat and may prolong the life of the wheel.
Works well in both indoor and outdoor environments; however a cast iron core can rust when exposed to frequent water or washdowns and harsh chemicals. Includes 1-1/4" Roller bearing which will include a bushing to fit a 1" spanner. And a Caster Expert will help you answer any questions.