Products:Outdoor decking requirementsMaterial:Chinese fir(C. lanceolata Hook)Description: Chinese fir (C. lanceolata (Lamb.) Hook); KD, S4S, eased edge in foursides of 4mm Thickness: 26/36.5(-0.5/+1.5mm)Width: 140/89mm(-0/+1.5mm)Length: 2.44m/3.05m/3.66m/4.2m7/4.88mMC: 15% average, 18% or less.Grade: Crack or split: overall six side only allow 20cm slightly split which haven't penetrate,no putty, no shake.End check: allow 10cm single side end checkBend tolerance: lengthtwistbowSide bend2.44m15mm7mm5mm3.05m20mm15mm10mm3.66m25mm25mm15mm4.27m30mm30mm17mm4.88m35mm40mm20mmAttention: the above bend tolerance only should control within 10% or less.Blue stain: slight (control within 10% of all)Worm hole: not allow producing area:china