Turbine Cover Fits 12" to 14" by Nordic Pure 17 1/2x27x1 Actual Size: 21 1/2 x

Actual Size: 21 1/2 x 29 1/2 x 3/4 (21

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Nordic Pure 20x20x5 Air Bear Replacement MERV 8 air filters measure an actual depth of 4 15/16"

Nordic Pure 12x18x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

Actual Size: 17 x 21 x 3/4 (17 x 21 x 0

Turbine Cover Fits 12" to 14" by Nordic Pure 17 1/2x27x1 Actual Size: 21 1/2 xUV protection; vent panel reduces inside condensation and wind lofting Breathable 300Dx300D 100% Polyester Material Prevents Rust and Corrosion Water and Mildew Resistant Reduces Heat Loss Help keep the cold air and dirt out of your attic and house today with our easy to use Nordic Pure Turbine Covers. Fits 12" turbines with external supports and 14" turbines with internal supports. Guaranteed for 3 Years Reduces Heat Loss Prevents Rust and Corrosion