16 in. x 8 in. Automatic Foundation Vent in Black (10 Vents per Carton) Vinyl Fence Posts The GAF Master Flow 15 The GAF Master Flow 15 Watt Dual Power Hybrid Solar Electric Roof Mount Exhaust Fan will help reduce excess heat and moisture from your attic to protect your roofing system from premature deterioration 0 Color Family Red Variable Speed Yes Battery Power Type Lithium Ion Grinder Switch Type Paddle Electronic Speed Control Yes Number of Batteries Included 2 Cordless Tool Type Angle Grinder Amperage (amps) 0 Condition New Power Tool Features Adjustable Handle Position Provides a functional way to vent the crawl space of the house 55 Shape Rectangular Color Family Black Automatic Manual Automatic Product Weight (lb