Wiremold Coupling features galvanized steel construction for excellent bonding and ground path management. It measures 2-1/2-Inch x 1-3/8-Inch. Coupling is ideal for use with OFR series multiple channel overfloor raceway. It joins lengths of OFRB-8 OFR series raceway base together. Coupling is cETLus certified and ADA/RoHS compliant.