Prime-Line N 6544 Door Roller, 7/8 in Dia Roller, 1/4 in W Roller, Nylon/Steel, Silver, 1-Roller, 50 lb, Top Mounting
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Steel base; fits Acme and Cox doors. 1/4 in W nylon wheel with 7/16 in OD x 1-1/2 in H steel base self-adjusts from 1-7/8 to 2-1/2 in in track for smooth guiding of lead door. For 1 to 1-3/8 in thick bi-fold doors up to 30 lb each.