Stationary Windbreak / Shade Panels - In the tests weve run, this panel stops over 95% of the wind velocity and snow does not swirl over the top like a solid windbreak. Cattle will not drift away from protection.Heat Flows Up Through HolesStops 79% of SunSet Up Instructions. The outside frame of these panels is made of 1 1/2 x 3: x 14 gauge tube. The 21% perforated sheets are 20 gauge galvanized-punched full of 1 5/8 holes and corrugated to 3.Weight per 12 sheet is 54 lbs. - 7 x 12 complete panel weight is 225 lbs