Mechanical seals being differential side seals, namely oil seals being located on each side of the differential; oil seals for use in land vehicles engines and machinery, namely, used for connecting differentials for land vehicles and drive shafts; Oil seals for automobile parts, namely, steering column for land vehicles, clutches for land vehicles, bearings for land vehicles, hubs for land vehicles, wheels for land vehicles, rack shafts for land vehicles, pinion shafts for land vehicles, pow...