The MTB Sampling Valve is a lever-actuated on/off valve used for storing and transporting samples in any GASTIGHT PTFE-Luer Lock (TLL) or Luer Tip (LT) syringe. Convert any TLL or LT syringe into a sample lock syringe using this simple accessory. The syringe attaches to the female luer lock connection leaving the male luer open for connection to any Kel-F® hub. The valves are pressure tested to 100 psig and are autoclavable. The bore I.D. is .039".