The green coated nozzle extensions are ideal for lined pipes when you want to protect the liner. They are covered with a special 3m product which is a specially formulated fusion-bonded epoxy, blended with quartz silica.
It has a high durometer that is resistant to many chemicals and goes down the line smoothly. It resists H2S, Benzene, Carbon Disulfide, Ethane, Methane, and more. The added coating protects the tool and the lining will not be scraped or scarred.