SAE Self-Adhesive Flange Protectors designed for use on SAE3000 psi ：1/2" ~5"，6000 psi ：1/2" ~3"，
it is made in black NBR rubber,thickless is 1.5mm
It used in during Indoor or Outdoor StorageLet air ,water and other liquild being separated from flange or ther components,so flange disc inside
can not corrosion。
also it used protects port and flange surface.