Offer Valid: 4/1/13 - 6/30/13 Buy any 3 Triple Tray boxes (mix/match), Get 1 Three-Quarter Arch T-Loc Free! Mix and match. To receive your free good, please send a copy of your Patterson invoice indicating appropriate purchase(s) to: Premier Redemption Center, P.O. Box 640, Plymouth Meeting, PA 19462-0640 or fax to 888-627-6160 or email to Redemptions@premusa.com. Indicate free goods of equal or lesser value. Redeem by 7/15/13. May not be combined with other offers.