This is an official Enviro (Envirofire) factory replacement Exhaust Starter Tube gasket for many Enviro Pellet Stoves. This part ships new in original Enviro packaging (this is not an after-market replica).
Enviro Part Number: 50-1448
Part Description: This high temperature gasket ensures that the Pellet stove gets a proper seal to the venting
Purpose: The gasket ensures a proper seal in between the pellet stove and exhaust starter. If the gasket is worn, smoke can escape
This is the official gasket replacement. Its not a cheaper after-market alternative.