Perkin Elmer SCIEX; Varian ICP-MS ; NU Instruments; Instrumentation. HEADSPACE VIAL KIT 20ML PTFE/RED RUBBER PRESSURE RSLE . £311.00 exc VAT. Read More. Product Code: C4020-46 SCREW TOP, HEADSPACE CLOSURE MAGNETIC 18MM WITH SILICONE/TEFLON SEAL, T/S. SCREW TOP, HEADSPACE CLOSURE, MAGNETIC 18MM WITH SILICONE/TEFLON SEAL, T/S . £62 .00