Material: America Black Walnut size:4000x650x38mm,4000x650x40mm, 3000x650x38mm,3000x650x40mm,2500x640x24mm Grade: A/B,B/C Material: America Black Walnutsize:4000x650x38mm,4000x650x40mm, 3000x650x38mm,3000x650x40mm,2500x640x24mmGrade: A/B,B/CMoisture:under 12%glue:D4 finger joint walnut panel