IMPERIAL STEM SIZE: Our casters are standard 5/16" with 18 TPI,Coarse Thread (US), the stud diameter is 5/16"-18UNC and the stud length is 0.79"(20mm), if your stem socket is METRIC M8, this caster is not suitable, please check before buy.
LOCKABLE CASTERS: Hirate caster constructed with brake pedal, it can brake the rotation of the caster only, but the stem is still moveable for direction.
QUIET & SMOOTH ROLLING: Made of high-tech elastic polyurethane, with internal bearings are quick rolling and the surface is sleek,wouldn't get stuck by crumbs,hair, wouldn't damage on floors.
SATISFACTION GUARANTEE: The package comes with set of 5 caster and few 5/16"-18 thread screw inserts . Each caster will be backed by Hirate with lifetime warranty of replacement free.
HEAVY DUTY CASTER - Steel structures body is extremely hard wearing and resistant to dirt, 650 lbs capacity for 5 pack 3 INCH casters, can be widely used for most chairs and other furniture with IMPERIAL STEM 5/16"-18UNC only.
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