O-Z/Gedney AXB expansion fittings allow for expansion and contraction of IMC and rigid metal conduit runs that are exposed to temperature changes, as in subways, bridges and pedways. The internal bonding jumper allows for placement in high-traffic areas without the worry of vandalism or theft. Additionally, the exclusive sliding outer casing allows for field inspection of the bonding jumper. The copper-braid jumper passes UL ground fault testing. AXB expansion fittings come in standard trade sizes for a wide range of applications and feature a corrosion-resistant, hot dipped galvanized finish.