The Nicro Snap-In Deck Plate is for use with any Marinco Snap-In vent system.
Hole Dimensions: 4" Diameter
Cut-Out Dimensions: 4-3/4" Diameter
WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to www.p65warnings.ca.gov