Click to expand Tap to zoom Metro 5MPB Super Erecta® Stem/Brake Caster, 5" by Metro Sale $57.00 | / SKU M-5MPB 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart PAIR IT WITH + Satisfaction Guarantee The Metro 5MPB Super Erecta® Stem/Brake Caster is used with Super Erecta posts and shelves to create a mobile shelving unit. 300 lb. load rate.