Hamilton Pneumatic Dual-Wheel Rigid Caster with 21" Pneumatic Air-Filled Tire with 1 1/4" Precision Tapered Roller Bearings
Bolt Hole 1: 7 x 7
Bolt Hole 2: 
Bolt Size: 0.63
Caster Rig Type: Weldment
Caster Type: Rigid
Color: Crimson Powder
Wheel Color: Black Tire on White Rim
Diameter: 21
Overall Height: 24.5
Top Plate: 8 1/2 x 8 1/2
Top Plate Length: 8.5
Top Plate Width: 8.5
Wheel Face: 6.88