Be Quiet! Silent Wings 4 Cooling Fan | 120Mm Pwm | 1600 Rpm | White | Bl114 Product Details Optimized fan blades for the highest performance on heat sinks 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations; Virtually inaudible operation at regular speed Small tip clearance and a fan frame with funnel-shaped air outlets for extremely high air pressure 6-pole fan motor and fluid-dynamic bearing for less vibration and very smooth operations 5-year manufacturer warranty German Design I German Engineering I German Quality I German Performance 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.