Guide spacers are one of those "little things" that are often overlooked, but can make a big difference in the performance of your car. Slot Car Corner Guide Spacers are useful when trying to set the height of the guide and/or to eliminate unwanted "slop" between the guide post and chassis. SCC offers two (2) thicknesses in Teflon - .010" and .020". Guide Spacers can be easily stacked to achieve the optimal thickness for a given guide/car. Made from Teflon, which doesn't require lubrication and has a lower coefficient of friction than spacers made from metal. Designed to fit most popular 1/32 guides.