Description100-Ton JR Jack replacement head gland View Parts Reliable WheelRelated Models100-Ton, 27″ (686mm) JR-Series JackView Model100-Ton, 38″ (965mm) JR-Series JackView Model ProductsSuperlift Jack ModelsHeavy Duty Hydraulic JacksElectric Hydraulic JacksJR Series Mobile JacksLow Profile JacksSuperlift Jack Options