STRAIGHT COUPLERS • Easy assembly/disassembly, no tools required, low profile design • Provide an air and water tight connection • Designed and tested to meet or exceed industry standards • Color coded to easily identify by size • Available for all Microduct sizes 5mm–27mm • Specially designed to ensure a smooth interior transition • Withstand chemical and harsh environment conditions •"HD" or"Heavy Duty" denotes enhanced pull-out and pressure characteristics.