CUSTOM ITEM: Septa, 17.5mm, Headspace, Transparent, Bluish Silicone Rubber / White PTFE. For use in 18mm Aluminum, Screw Caps, sold separately. MICROSOLV Brand. 1000/CS.
Additional Info:
The 95025-22 MICROSOLV Headspace Septa are a made‑to‑order, high‑purity septa solution designed for use with 18 mm precision thread (ND18) screw‑top headspace caps (sold separately).
These septa feature transparent bluish silicone rubber laminated with ultra‑clean white PTFE, providing excellent chemical inertness, low extractables, and consistent analytical performance for sensitive GC headspace applications.
Custom Order Item – Critical Notice
🚨 Made‑to‑order product
Non‑returnable and non‑cancelable once ordered
May require:
Lead time
Availability confirmation
✅ Recommended for validated workflows requiring high‑purity ND18 septa
Designed for ND18 Screw Cap Systems
Diameter: 17.5 mm septa
Compatible with:
18 mm precision thread (ND18) screw caps (sold separately)
✅ Ensures:
Proper fit
Reliable sealing performance
Silicone/PTFE Construction – High Purity Performance
Transparent bluish silicone rubber / white PTFE
Provides:
High chemical inertness
Low bleed and extractables
Clean chromatographic baselines
✅ Ideal for:
sensitive GC headspace analyses
trace‑level detection workflows
Soft Septa – Easy Needle Penetration
Durometer: 45 Shore A (soft formulation)
Septa thickness: 1.3 mm
Provides:
Reduced penetration force
Smooth autosampler needle entry
Reduced needle wear
✅ Improves:
injection reproducibility
autosampler reliability
Septa Characteristics – Consistent Performance
Balanced design provides:
Reliable resealing after puncture
Stable multi‑injection performance
Good mechanical integrity
✅ Suitable for routine and sensitive autosampler workflows
Bulk Packaging – High Throughput Efficiency
1000 septa per case
Supplied in:
Polyethylene bags
Designed for:
High‑volume laboratories
Routine analytical environments
✅ Improves:
Inventory management
Workflow efficiency
Performance Positioning – ND18 High Purity Soft Septa Option
Compared to butyl/PTFE:
✅ Higher chemical inertness
✅ Lower extractables
Compared to harder septa:
✅ Easier needle penetration
Compared to thicker ND18 options:
✅ Reduced resistance for autosampler needles
✅ Ideal for:
ND18 screw‑top headspace workflows
high‑purity analytical labs
sensitive GC methods
Typical Applications
Headspace GC analysis
Pharmaceutical QA/QC
Environmental VOC testing
Food and flavor analysis
Automated ND18 screw‑top workflows
Important Usage Notes
Designed for:
ND18 screw‑top caps (sold separately)
Ensure:
Proper placement in cap prior to use
✅ Best suited for:
high‑purity, automated headspace GC workflows
🚨Made‑to‑Order & Pricing Information
This is a custom, made‑to‑order item.