Is specifically designed for close clearance dryer transition duct applications. It effectively resolves overlapping or closely situated dryer and wall outlets, ensuring optimal airflow with its smooth interior that minimizes air friction. Constructed from high-quality this periscope features a rigid 2inch x 6inch build. Its telescopic sections adjust from 0inch to 5inch, providing flexible installation options. Note that the sections are fixed and not reversible for added safety and ease of use. The periscope includes a 4inch male, crimped rotating snap-lock collar for secure connection to the wall outlet, and a 4inch female, draw band rotating collar that snugly fits over the dryer outlet, ensuring a tight and efficient vent connection. Compliant with all clothes dryer manufacturer specifications, this periscope vent avoids the use of easily crushable plastic or metal foil vents.