... , B, C, DA---A face No defects, no sap, good bright colorB---A face Sound tight knots not exceeding ... 5 mm, no sap, PKND good bright colorC---A face Sound tight ... knots not exceeding 20 mm, no sap, good bright colorD---A face Sound tight knots not ... exceeding 40 mm, no sap, good bright color 9. PACKING: Every panal wrapped ...