Hanes Expandable Roller Half. Highly economical system of 1-1/2" steel conduit spindles, high-impact ABS plastic rollers and simple clips. Rollers snap in and out of clips, mounting clips fit onto the top of most I-Beam and C-Channel trays, so existing wire is not disturbed. 8" (203.2 mm) to 48" (1219.2 mm) wide rollers are available, using expandable roller halves and 3" (76.2 mm) PVC conduit. Use Greenlee Cable-Cream to lube spindle and roller. This lubricant is compatible with all cable insulation types.