Easy Connect Sleeve (ECS) is assembled simply by tightening one Allen wrench bolt which will take only a few seconds. ECS's are airtight with no protrusions into the air stream.They are ideal for dust collection systems, which require quick disassembly and reassembly of ductwork, or when a fast labor saving installation is important.Sleeves have a polyethylene seal that has sufficient elasticity to accommodate the spiral duct seam. When the connector is tightened the galvanized metal sleeve contacts the duct wall to provide rigidity. No rivets, screws, or sealant are needed to assemble the Easy Connect System. Spiral pipe NOT included.