The basic Grid-Lign coupling consists of two steel shaft hubs, a high strength spring steel tapered grid element, two seals and a cover assembly. Misalignment and end float are accommodated by the sliding action of the grid in the lubricated hub grooves. Dodge Grid Coupling Hub, Rough Stock Bore Type T10/T20, 1150T Coupling, 4.1 to 8 in Bore Dia, 10.6 in Hub Dia, 1500 rpm Maximum, 7.2 in Length Through Bore, Steel