Pasco 1723 4" Dryer Duct Clamp, Plumbing Accessory Model: PAO-1723 Pasco 1723 4" Dryer Duct Clamp, Plumbing AccessoryThe Pasco 1723 is a 4" dryer duct clamp designed to secure duct connections in residential and commercial rough-in plumbing and appliance venting... Pasco $1.28 Sale