Premier Flex Heavywall Liners

Premier Flex is extremely durable, featuring an interlocked design to maximize strength and flexibility!  It is the most rugged liner we recommend for those tight winch-able situations.  It can also withstand to be ovalized or rectanglized (see our custom rectangle/square chart) to accomodate for unusual offsets or rectangluar chimneys.  It is important to remember that when a liner is taken "out of round" it does reduce the cross sectional area, so if you have any questions or need help sizing the liner, please call our FREE Tech Support at 1-888-889-2262.  and dont forget our custom sheet metal shop team can make any fittings needed for your custom job. M-FLEX Aluminum Liner Kit

Available in:


  • 3" - 12" diameter
  • 5 foot increments
  • Custom rectangle, square, and oval sizes available