Sigma Engineered Solutions Sigma Electric ProConnex TC-611 EMT Compression Coupling 1/2-Inch, 50-Pack Sigma's EMT Compression Couplings are used to connect two lengths of steel EMT conduit in dry locations. These die-cast zinc couplings are approved for concrete-tight applications. Features Connects two lengths of 1/2-in EMT conduit Compression type For concrete-tight and dry location applications Zinc die-cast construction Product is UL and CSA listed USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.