Click to expand Tap to zoom Metro 5MDBA Super Erecta® Stem/Brake Caster, 5" dia. by Metro Sale $41.33 | / SKU M-5MDBA 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart PAIR IT WITH + $78.59 Sierra FSW140B 2-Layer Conductive Smooth Rubber Worktop Mat Kit, 30"x60"x.080", Blue 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.