Collect, store and analyze samples without danger of evaporative loss or environmental contamination. Applications include environmental sample collection and storage; pre-pressurization of gaseous samples for GC analyses; sample spiking; and purge and trap operations. Twist valve locks samples in the syringe. Positive rear stop prevents plunger blowout and loss of sample. Internal standards can be injected through the valve port into samples contained in the syringe. Needle length: 2", point style 2. See 8929F53 to F95 for replacement needles.