18x12x1
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Koch 102-081-001 – 18x12x1 Extended Surface Pleated Air Filter, MERV 11
$204.72 per 12 pcs ($17.06 each) -
18x12x1 Pleated Air Filter – Semi, Multi-Pleat, XL8, Koch 102-041-001
$160.08 per 12 pcs ($13.34 each) -
18x12x1 High-Capacity Multi-Pleat Air Filter – XL8, Koch 102-031-001
$163.44 per 12 pcs ($13.62 each)