5" x 2" Cast Iron V-Groove Wheel Kingpinless Rigid Caster - 900 Lbs Capacity capacity-3001-4000-lbs and 1/2" ID x 2-7/16"

and 1/2" ID x 2-7/16" long stainless steel spanner

Ball support cup is hardened and plated

Wheel Tread Shape:Flat Temp Range: -40˚F to 600˚F Wheel Color:Grey Weight:6

5" x 2-1/4" Solid Steel U-Groove Wheel - Part # PWMO50158

5" x 2" Cast Iron V-Groove Wheel Kingpinless Rigid Caster - 900 Lbs Capacity capacity-3001-4000-lbs and 1/2" ID x 2-7/16"5" x 2" Cast Iron V Groove Wheel Kingpinless Rigid Caster Part # P50052VIRB V Groove wheels are designed to guide equipment by rolling on inverted angle iron track, however, they can also operate while not on a track thanks to the tread on either side of the v groove. The cast iron wheel offers a strong, resilient, cost effective solution for heavy loads. If more capacity is needed, check out the heavier duty ductile steel & forged steel wheels. *