Part# 12S40PO82BF23HX SPECS Fork Type: Swivel Wheel Diameter: 4" Wheel Tread Width: 1-1/4" Wheel Type: Polyolefin Wheel Durometer: Shore D 70 (+/-5) Bearing Type: None/ Plain Bore Fastening Type: Top Plate Top Plate Size: 2-3/8" x 3-5/8" Bolt Hole Spacing: 1-3/4" x 3" Bolt Hole Size: 5/16" Temp Range: -20° to 180° F Brake Type: Tech Lock