Product Description
VialMAX™ Silver Magnetic Screw Cap with Septa for 10mL and 20mL Headspace Vials, 1000/case (10 packs of 100)
VialMAX™ Silver Magnetic Screw Cap with Septa, 18mm, for 10mL and 20mL Headspace Vials
Magnetic transport autosamplers need a cap the magnet can actually grab. This 18mm silver screw cap is built for that: a precision thread that forces the septa tight against the vial rim for a gas-tight seal, plus enough exposed metal surface for reliable magnetic pickup on CTC PAL, Gerstel, and similar systems. Pre-fitted septa mean no separate assembly step before your run.
No hidden fees, ever: case pricing is exactly what you see, and ground shipping out of Maryland is always free.
Specifications
| Spec | Value |
|---|---|
| Neck finish | 18mm screw thread, precision thread |
| Cap material | Magnetic stainless steel, silver |
| Cap style | Open-top, magnetic, 8mm center hole |
| Vial compatibility | 10mL and 20mL headspace vials, 18mm thread |
| Septa | Pre-fitted septa, SPME/headspace compatible |
Key Features
- Magnetic steel cap enables pickup on CTC PAL, Gerstel, and other magnetic-transport autosamplers
- Precision thread forces the septa against the vial for a gas-tight seal through heating cycles
- 8mm open-top center hole supports both SPME and standard headspace needle access
- Pre-fitted septa, ready to cap and run
Recommended Applications
- Headspace GC and GC-MS on magnetic-transport autosamplers
- SPME sampling
- Volatile organic compound and residual solvent testing
- Any 18mm-thread headspace workflow needing a repeatable gas-tight seal
Compatible With
Fits standard 18mm precision-thread headspace vials, including our 10mL and 20mL VialMAX headspace vials.
FAQ
What septa material is included? SPEC NEEDED. Contact us to confirm the exact septa material and thickness before ordering if this is critical to your method.
Does this work with regular (non-precision-thread) 18mm vials? No. Precision-thread magnetic caps are built specifically for precision-thread vials and won't seal properly on standard 18mm screw vials.
Is this cap reusable? These are designed as single-use closures for sample integrity, though the septa can sometimes tolerate multiple punctures depending on your injection volume and frequency.
Which autosamplers is this compatible with? Magnetic-transport systems like CTC PAL, Leap, and Gerstel, plus any autosampler that accepts standard 18mm precision-thread headspace caps.
Does the center hole work for SPME fibers? Yes, the 8mm open-top design is sized for both SPME fiber access and standard headspace needle penetration.
