... 3.material:PP; 4.disposable goods; Disposable Self-locking Plastic Seals :Description Product namePlastic sealTemperature10 degrees to 70 degrees;Spot ... ,railway,oil-transportation,foreign trade testing department,and the confidentiality purposes in finance,store,electrical,petrolemu,air ... blue,yellow,green,black,and other colorsUsageInsert the seal into the hole of the blank plate,and then draw it ...