You are buying:20 Pcs Sales/Order/Receipt Book Carbonless Each book has 50 receipt Sets & 2 PartsEach set has its own invoice number for easy record keepingMeasures approximately 5 9/16″ x 8 7/16″ (141 x 214 mm) This receipt book is perfect for retail stores, office purchase order or any other selling occupation Has 50 sets of receipts. We do not ship to P.O Boxes. Physical addresses only. WHOLESALE BUYERS PLEASE CONTACT US, SO THAT WE CAN OPEN A LISTING FOR YOU ON EBAY