This is a pack of 5 replacement mouthpiece sleeves made for the G-Pro Vaporizer from Grenco Science. The pack includes 3 regular and 2 extended sleeves.
Review by Marco on July 16, 2015
"Picked these up when I ordered my G-Pro a couple of weeks ago. They're coming in pretty handy. I really like the extended ones, because sometimes the mouthpiece gets a little warm."