Click to expand Tap to zoom Metro 5MC Super Erecta® Conductive Stem/Swivel Caster, 5" dia. by Metro Sale $43.33 | / SKU M-5MC 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart The Metro 5MC Super Erecta® Conductive Stem/Swivel Caster is used in conjunction with aluminum split sleeves and a grounding cable, ensures mobile units are properly grounded to ESD floor surfaces. 175 load rate.