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The PRIME LINE PRODUCTS N 6513 is a two-pack closet door roller replacement designed for Cox-brand sliding and bifold closet door hardware systems. Each roller features a 1-inch nylon wheel and a 3/4-inch back offset, making it a direct-fit solution for worn or damaged rollers that cause doors to bind, jump the track, or roll unevenly. The nylon construction resists corrosion and operates quietly without lubrication. This hardware is installed by carpenters, general contractors, and skilled maintenance professionals handling interior door service and repair.
This roller set is suited for residential closet door applications where the original Cox door hardware has degraded over time. The 3/4-inch back offset positions the door panel correctly relative to the track, maintaining proper door alignment and smooth glide. Each package contains two rollers, covering a single door panel or providing one replacement roller per door on a two-panel closet opening. The carded retail packaging makes it easy to identify the part at point of sale or in a service inventory.
Designed as a direct replacement roller for Cox closet door systems requiring a 1-inch nylon roller with a 3/4-inch back offset.
Installation is typically performed by a carpenter or general maintenance technician using basic hand tools. Remove the door panel from the track before servicing rollers to avoid injury and prevent track damage. Inspect the track for wear or debris before installing new rollers, as a damaged track will shorten roller service life. Follow the door manufacturer guidelines for proper roller seating and door panel rehang.
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