Nutone Built In Crushproof Non Electric 30 Foot Central Vacuum Hose. 

Built In Nutone Central Vacuum Cleaner Hose Assembly 30 Ft Crushproof-Black. 

Wall plug in end is 1 3/8 inches and the opposite vacuuming end is 1-1/8 inches. 

NON ELECTRIC HOSE WILL NOT OPERATE A POWER NOZZLE. 

Manufacturer Part Number: 06-1103-98.    

SC-06-1103-98