FeaturesSnap-N-Stac® combo duct spacers are specifically designed to replace the 2-piece base and intermediate spacer system, by combining the conventional base and intermediate spacer into a single unitManufactured out of highly engineered thermoplastic material, Snap-N-Stac® spacers are strong, durable and able to withstand the rigors of concrete constructionInnovative horizontal and exclusive vertical locking system and can be can be used as either a base or intermediate spacerThey accept 2, 3, 4, 5 and 6 in pipe and can be installed horizontally, vertically or turned upright for unique duct bank configurationsNon-corrosive and non-conductiveStrong and durableEasy to handleFast installation