The 6" Slip Connector is designed to allow simple installation when the measurement between your stove and ceiling do not add up to standard lengths of pipe, which they never do. No cutting is required, simply get your standard lengths within 4"-16" of your ceiling and install the adjustable length making your stove pipe installation simple. Slip connector measures 18" long and when used with a rigid piece of pipe it is adjustable from 4" - 16".