The 18-29″ Periscope is used for close clearance dryer transition duct.
It solves situations where the dryer needs to be closer to the wall and the outlet is within 18-29″.
The smooth interior decreases air friction for excellent airflow.

Made of 2″ x 6″ rigid 26 gauge aluminum
One 4″ male, crimped rotating snap-lock™ collar fits into wall outlet
One 4″ female, draw band rotating collar fits over dryer outlet
Two sections telescopes from 18-29″
Reaches the side of most dryers.
Sections are reversible for airflow the same or opposite
Meets clothes dryer manufacturer specifications
UL® and non-UL® versions