Offer Valid: 4/1/13 - 6/30/13 Buy 2 PoGo refills, Get 1 Enhance refill Free! To receive your free goods, please mail your Patterson invoice noting free product(s) desired to: DENTSPLY Caulk, 38 West Clarke Avenue, Milford, DE 19963 or fax to: 1-800-788-4110. Purchase must be made on one invoice. Limit 5 redemptions of each offer per doctor. Offer may not be combined with any other Dentsply offers or contract agreements. All free goods fulfilled through Dentsply. Free goods must be of equal or lesser value. Invoice must be received no later than 7/31/13 to claim free goods.