JBC Tools OB1000 Sealing plug for JBC Tools T210 series handles Pack of 10 Prevents flux vapors or particles from entering the handle For intensive applications when soldering in FOD environments For applications where the soldering iron works near a vertical position Sealing Plug for JBC Tools T210 Series Handles (Pack of 10) The JBC Tools OB1000 is a sealing plug for the JBC T210 series handles. It comes in a pack of 10. The Seal is meant to prevent undesirable flux vapors or particles from entering inside the tool.Its usage is highly recommended for intensive applications when soldering in exposed to FOD environments or for applications where the soldering iron works close to a vertical position.