(15) Easy-on, easy-off convenience with a twist of the cap that produces an evaporation-proof seal. Larger opening provides increased target area for needle penetration. Available in a variety of colors for easy sample identification.
(4) A convenient and easier alternative to aluminum seals, the 9mm magnetic cover and screw thread closure prefitted with a variety of septa is designed for use in CTC GC PAL, Agilent, Gerstel and Shimadzu instruments.