Click to expand Tap to zoom Metro 5MDBA Super Erecta® Stem/Brake Caster, 5" dia. by Metro Sale $44.00 | / SKU M-5MDBA 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart PAIR IT WITH + Satisfaction Guarantee The Metro 5MDBA Super Erecta® Stem/Brake Caster with high modulus donut wheel tread is used with Super Erecta posts and shelves to create a mobile shelving unit. 250 lb. load rate.