16X25X1 Glasfloss Fiberglass Air Filter, Double Strut, Gds Series,, Box Of 6 Product Details Glasfloss GDS 16x25x1 disposable, double-strut furnace filters are excellent for protecting your heating and cooling system and indoor air. These air filters offer a double-strut design that provides durability and a 10% greater open surface area than traditional fiberglass filters. The air filter frame is constructed of heavy-duty craft board that the fiberglass media is bonded to. Heavy-duty, one piece craft board frame. Double Strut design for performance and durability. 10% greater open area compared to other furnace filters. Easy to install and remove. No metal parts or sharp edges. Provides good equipment protection. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.