Ball transfer units are used where product must change direction or at an intersection of two conveyors. Table assemblies are designed to match-up with 1.9" diameter roller conveyor frames. For existing conveyors, the drop-in insert plate design allows for the removal of rollers and ball assembly insert plates to be "dropped-in" and bolted, applies to 1.9" & 1-3/8" roller conveyors. Supports not included with ball table assemblies.