So far so Good
28-11401 - 4" Worm Screw Clamp for Dryer Vent Hose
Adjustable from 3-9/16" to 4-1/2" diameter
Two each required for aluminum dryer vent duct (MCM part number 28-11400)
MCM is our low cost, high product value source. Same quality as the more expensive vendors, without the "expensive." Always fast and dependable.