ovenproof labels: 1.diameter size:5mm,6mm,8mm,..... 2.material:polyimide film. ovenproof labels /kapton labels1). Size: 5mm,8mm… up your request.2). Material : Polyimide FILM.3) the high temperature resistant is 280ºC.4)protect the PCB from the pyrolytic coating and so on.5) packing: 2000 pcs/roll, 4000 pcs/roll .