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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
Koch Filter 102 499 028 MULTI PLEAT XL11 SC 4" Standard Capacity MERV 11 Pleated Panel Filter Size 20x20x4 6400079 Minimum order 20ea : $29 Minimum order 20ea : $29 • N – non oil resistant not for use in atmospheres containing oil As the effectiveness of the electrostatically enhanced E layers decreases developed by Koch Filter specifically for use in extended surface air filters
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