Plastic Shelf Bins and Shelving Units Additional Plastic Shelf Bins, Cups, and Shelving Units are available, see Grainger.comHigh-density shelf bins feature a molded-in label holder, and a wide hopper front and built-in hanglock for easy access to contents. Optional dividers fit horizontally across bin and allow easy part labeling with individual label slots. 4" and 8" bins can accomodate up to 7 dividers and 6" bins can accomodate up to 8 dividers. Shlf Bin, 11-5/8 In. L, 4-1/8 In. W, 4 In H