Offer Valid: 4/1/13 - 6/30/13 Buy 15 Packs of Maillefer hand files, Get 2 packs of hand files Free! OR Buy 25 packs, Get 5 Packs Free! To receive your free good please mail a copy of your Patterson invoice indicating desired free products to: Dentsply Maillefer, 2nd Quarter Offers, 5100 East Skelly Drive, Suite 300, Tulsa OK 74135 or fax to 800-924-7389. Offers must be redeemed by 7/31/13. Not valid for Maillefer ESP Reward or Formulary customers. Limit 5 redemptions of each offer per doctor. These offers may not be combined with any other Dentsply offers or contract agreements.