6" x 7-1/2" Weld on Top Plate / Shim - Unplated 8" x 2" Ductile Steel Rigid Caster it is the harshest wheel

it is the harshest wheel type for floors and could lead to floor damage

and polyolefin wheels

300˚F (Dependent upon bearings) Mounting Plate: 5-1/4" x 7-1/4" Wheel Hardness:  Rockwell 80B Bolt Hole Pattern: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8" Wheel Color: Silver Mounting Bolt Size: 1/2" or Smaller Link to Replacement Wheel: P063002039 Weight: 25 lbs

4" x 5-5/8" Steel Nose Roller Wheel - Part # V465RO

6" x 3" Forged Steel Wheel Swivel Caster - Part # P7106301201

6" x 7-1/2" Weld on Top Plate / Shim - Unplated 8" x 2" Ductile Steel Rigid Caster it is the harshest wheel6" x 7 1 2" Weld on Top Plate Shim Part# PTOP PLATE 80 These weldable top plates can be used in variety of ways. Most commonly they are used by welding them to your equipment and then bolting a caster to it. Many customers weld the caster directly to the equipment, however, when it comes time to replace the caster they have to cut them off. This plate eliminates the time and cost of cutting off the caster by allowing you to simply unbolt the caster.