Click to expand Tap to zoom Metro 5MPX MetroMax iQ® Polymer Stem Caster, 5" Dia. by Metro Sale $48.67 | / SKU M-5MPX 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 5MPX MetroMax iQ® Polymer Stem Caster is for use with either MetroMax i polymer or MetroMax Q steel stem caster posts. 300 lb load rate.