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4'' Maroon Poly Swivel 7/8'' Expanding Stem Caster Set Total Lock Brake, 4PK The Series #20 features an innovative expanding stem that can easily adapt to the inside diameter of the opening, allowing for a secure fit in round or square tubes. Listing is for a set of four 4 Service Caster Series #20 7/8'' expanding stem swivel casters with 4'' diameter by 1-1/4'' wide maroon polyurethane wheels and total locking brakes capable of supporting a total weight of 1,400 lbs. For added security, further compress the rubber with a wrench via the nut under the swivel raceway. Simply tighten the topmost knurled nut to compress the rubber for a snug fit.
