Description PBO felt pad is made of high temperature fiber PBO + Kevlar fiber + high temperature fabric.Considering the discharge port’s temperature is very high,and will have high density requirements,so the PBO block will be involved in a middle layer of high temperature fabric, so that Acupuncture will be better,each layer of cotton to better stab together, finished product density will increase. In general, pure PBO felt blocks (made of 100% PBO fibers) are more suitable for aluminum extrusion machines with double-sided discharge ports. Specification Color:Brown+Yellow Material:PBO（surface）+Para aramid（In layer）+ Para aramid fabric Temperature Resistance:600℃（