Casters “bolt on” type with metal plate for later models Rowe/AMI, Rock-Ola, Seeburg, and Wurlitzer jukeboxes. 

Dimensions:

• Height: 2-1/2 inch (65mm)
• Wheel: 2 inch (50mm) Diameter x 53/64 inch (21mm) Wide
• Mounting plate: 2-5/8 x 1-3/4 inch (66.5 x 44.6mm)
• Mounting Plate Holes ID: 9/32 inch (7mm)
• Mounting Hole Spacing: 2-1/8 x 63/64 inch (54.5 x25mm)

NOTE: These are generic casters – the hole pattern will probably vary from your jukebox model and new holes in the cabinet base may be needed.