Check the listing for details. CasterHQ - 6" X 2" Green Polyurethane ON CAST Iron CORE - 1,200 LBS Cap - Replac. Condition: New. Listed at 24.98 USD. CasterHQ's Green Polyurethane elastomer tread is chemically bonded to a black 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; if this is an issue look at using aluminum or plastic core wheels. Features Durometer: 95 Shore A (+/-5). Temperature range: -40� F to 180� F.Specifications for this item Part Number CB-PCI62 Load Capacity 1200.00 pounds UPC 689355025083 Brand Name CasterHQ Capacity 1200.00 pounds Color green EAN 0689355025083 Item Weight 6.0 pounds Manufacturer Series Number CB-PCI62 Material Polyurethane Model Number CB-PCI62 Number of Items 1 Size 6" Special Features Wheel Diameter: 6" , Tread Width: 2" , Wheel Material: Polyurethane on Cast Iron , Load Capacity: 1200 LBS , Bearing Type: Roller Bearing , Color: Green on Black , Temp Range: -40F - 180F , Hub Length: 2-3/16" (2-7/16" w/ spanner) , Bearing Size: 3/4" Roller w/ 1/2" spanner , Durometer: 95 Shore A (+/-5) Tension Rating 1200.00 pounds UNSPSC Code 24100000 Wheel Diameter 6 inches Wheel Tread Width 2.00 inches Listing and template services provided by inkFrog