Click to expand Tap to zoom Metro 5MP Super Erecta® Stem/Swivel Caster, 5" dia. by Metro Sale $51.67 | / SKU M-5MP 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart PAIR IT WITH + Satisfaction Guarantee The Metro 5MP Super Erecta® Stem/Swivel Caster is used with Super Erecta posts and shelves to create a mobile shelving unit. 300 lb. load rate.