The Shop Vac 18' HangUp Pro Vacuum Hose part # 9192900 is a 1.25" hose for the 5 gallon HangUp Pro vacuum model QMH45A.
The Shop Vac 18 foot HangUp Pro vacuum hose is compatible with 5 gallon HangUp Pro vacuum part # 9520262 and for use with 1.25” wands and tools only (opening about the size of a golf ball).