This is a valid coupon on the 3m website but you may have a hard time getting stores to accept it. Stores have lost so much money because of fraudulent Internet coupons that they have cracked down on what they will accept. Allison said that Fry's, Basha's, and Albertsons will not accept printable coupons for free items. I haven't ever had a problem with it at our QC Fry's, but it might depend on the cashier. I'm not sure about Safeway and Wal-Mart. I think this is worth printing and trying though! Please, use restraint when using this coupon. It is in a PDF format so it does not limit how many you can print. I would not use more than 2 at a time.
Info courtesy of: AllisonsAZDeals