Spindles and Idlers are used to guide operating cords/cables around Model 1400 track curves. Model 1458 Spindles are used only on the half of the track system that includes the Live-End pulley. Constructed of plated or powder coated formed steel with steel tube equipped with 2 ball-bearings for guiding cord/cable attached to the track system master carrier. Also equipped with a ball-bearing wheel for guiding the return cord (not attached to master carriers). Minimum pocket width to accommodate spindles and idlers: Approximately 8". Not included with CWANA systems. Must be ordered separately amount depends on size and degree of curve(s)