Hamilton Aerospace Spring Loaded Forge Master Swivel Caster with 10" x 4" Heavy Duty Solid Pneumatic Tire with 1-1/4" Tapered Roller 
Bolt Hole 1: 3 3/8 x 5 1/4
Bolt Hole 2: 2 7/16 x 4 15/16
Bolt Size: 0.5
Caster Rig Type: Kingpinless
Caster Type: Swivel
Color: Platinum Powder
Wheel Color: Black Tire on Orange Rim
Diameter: 10
Overall Height: 14
Top Plate: 4 1/2 x 6 1/2
Top Plate Length: 6.5
Top Plate Width: 4.5
Wheel Face: 4