Hamilton Ultra Maxi-Duty Dual-Wheel Swivel Caster with 18" x 5" Nylast Wheel with 2" Precision Ball Bearing
Bolt Hole 1: 12 X 12
Bolt Hole 2: 
Bolt Size: 0.75
Caster Rig Type: Integral Forged Kingpin
Caster Type: Swivel
Color: Platinum Enamel
Wheel Color: Charcoal Gray
Diameter: 18
Overall Height: 23.63
Top Plate: 14 x 14
Top Plate Length: 14
Top Plate Width: 14
Wheel Face: 5