*With approved credit, special offers are not valid for previous customer orders and cannot be combined with any other discounts or previous special offers. Not valid with other offers or estimates. Minimum purchase of (4) Windows and/or Doors. The offer expires on October 31, 2020. *Discount applied by retailer representative at the time of contract execution and applies to purchase of  Infinity windows; and  Infinity patio doors.   Only Marvin's product lines are eligible for the offer. Cannot be combined with other offers. To qualify for a discount offer, initial contact for a FREE Window and Door Estimate must be made and documented on or before 10/31/20 with the appointment then occurring no more than 14 days after the initial contact.  May not be combined with other offers or previous orders.