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)
Smooth flawless transaction. Quality products for great prices. I compared my item to other stores before buying and was blown away by the price difference.