Builders Edge 3SMU811TW4 SturdiMount Mounting Block, White 4thJuly Duct opening: 19-3/4" x 19-3/4"

Duct opening: 19-3/4" x 19-3/4" x 9-5/8"

Style: Max Performance

dirt or other foreign matter

multi-purpose knife features a stainless steel blade

Collapsible design

Builders Edge 3SMU811TW4 SturdiMount Mounting Block, White 4thJuly Duct opening: 19-3/4" x 19-3/4"Used for installing standard lights and dryer vents; easy installation; pre assembled; pre flashed; pre painted; paintable and durable nailing flange. Highlights: Color: White Material: Fiber Cement Length: 14 1 4 inch Width: 11 9 16 inch Mount standard lights and dryer vents using this universal mount Made of cellular PVC to provide a lifetime of maintenance free beauty and comes with an ABS flange