The Kendall Howard series of Flat Spacer Blanks is a cut above the rest. Most people think of spacers or fillers as just that, something to fill up a gap in your rack to give it a fuller look. More important than just looks is the added strength that each rack mounted component you install adds to your racking system. Some racks can experience more than twice the strength and ruggedness by simply installing Spacer Blanks at regular intervals. We recommend installing either a component or spacer blank at least every 8U Spaces (17.5") for racks over 12 U.