Mobility and Daily Living Aids Health & Household, Medical Supplies & Equipment, MJM International, Mobility Aids & Equipment, Mobility Scooters & Accessories, Wheelchairs MJM International R5HD Replacement Heavy Duty Caster Set, 5″ (Pack of 4) Review by RoomPony July 22, 2018 No Comments Product Description Replacement 5″ x 1 1/4″ heavy duty threaded stem casters / set 2-lock 2-nonlock. Manufacturer Contact Information 800-270-6199