The IMB INSERT UNIT (IU) is a high precession pre-set unit,Meant to optimize performance when used in all kinds of commercial vehicles. The IMB TRUCK AXLE MODULE (TAM) bearings are integrated in the wheel hub. TAM are units made up of two perfectly aligned lubricated for life and pre-set bearings.All Type Orginal IMB Bearing Available call for order +91 88284 34073