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These are four flexible magnetic sheets sized 8 by 15.5 inches, made to sit over steel floor, wall and ceiling registers and block airflow. The 1.5mm magnet layer is thicker than the thin magnetic sheets many rivals sell, so it grips flat steel more firmly and is less likely to slide. The sheets can be trimmed with scissors to fit odd vent shapes, and the white face blends with most ceilings and walls. They only hold on steel; aluminum, wood and plastic registers will not attract them.
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Lowest price we've seen: $17.99 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Buyers rate these covers well, mainly for magnet strength and fit on standard steel registers. Complaints center on vents that are not steel and on covers that do not seal tightly on uneven grilles.
This set includes four magnetic vent covers, each 8 inches by 15.5 inches. The covers are made from ultra-thick 1.5mm magnetic material with a white surface. The flexible material can be cut to fit different vent shapes.
The covers stick to steel vents and registers on floors, walls and ceilings. They do not stick to aluminum, wood or plastic. They suit most standard air registers in homes, RVs, HVAC units and furnace vents.
Placing a cover over an unused register closes it off and controls airflow. This can help reduce energy costs.
