... , 300D/144F2>weight: a)single layer(double sides): 1.5~4.0kgb)double layer(double sides): 3.0~8.0kgc)weft knitting density ... a) 20''ft: single layer, double sides:1.4kg(2700pcs); 3.6kg(1000pcs)double layer, double sides:3.0kg(1200pcs);7kg(550pcs)b) ... 40''HQsingle layer, double sides:1.4kg(5500pcs); 3.6kg(2100pcs)double layer, double sides:3 ...