Stair tread Finger joint 1. Grade AA, without knots 2. 100% vertical grain 3. F4 stars glue Item:Stair tread Finger jointMain market:Korea,JapanDimension:Korea-12/15/18/24/30 x 915/1170 x 2300mm 37/38 x 300 x 3600mm or customised sizes availableJapan:20/25/30 x 500/600 x 4200mmDIY: 12/15/18 x MAX450 x MAX2700mmGrade:AAGlue:F4strarDiscription:100%straight grain,ECO products, Two sides clear of ...