Detailed Product Description Technical parameter ItemsExplanation Bag materialSuch very hot composite as OPP/CPP , CPP/PE ,etc.; Require one is used , external diameter ?ü 400 , the diameter of the interior axle is 75mm; Membrane surface is it level to demand, edge can't have wave type, color specification and pack membrane bottom require to compare with obviously. Bag size50-150mmW80-200mm(L) ...