There are different types of heater hose, from standard to heavy duty. Touch device users, explore by touch or with swipe gestures. So it should be sealed now.
The minimum clamp diameter for the standard series is ⅜ inches, and the maximum diameter is about 7/16 inches. Touch device users, explore by touch or with swipe gestures. The t i used had a 1/4 end, and two smaller ones that fit perfectly in the supplied vacuum line agp sent me in the kit. If you buy an extension hose, often it will come with adapters for both sizes.