It's a small motor and fan, usually found behind the glove box on top of the heater duct, connected to the end of the foam hose. The fan pulls air through the hose.

http://www.peachparts.com/shopforum/showthread.php?t=101677

Also, check Post #4 here
http://www.peachparts.com/shopforum/showthread.php?t=104055&highlight=sampler+blower

Best Regards,
Jim