Caps, Screw Top, with Soft-Guard, White Silicone Rubber / Red PTFE Pre-Slit (X Shape) Septa, fitted in "knurled", polypropylene, Yellow Caps. For use with 9-425mm thread, 12x32mm autosampler vials. Soft-Guard Brand. 100/PK
Additional Info:
X‑shape pre‑slit septa create a larger needle strike zone, helping guide needle entry and reduce penetration resistance in autosampler workflows.
The 9502S‑E‑3XY Soft‑Guard™ Screw Caps use an X‑slit silicone/PTFE septum that allows easier penetration compared to single‑slit designs, though with reduced resealing performance. The Soft‑Guard™ formulation minimizes coring and supports consistent injections across HPLC, GC, LC‑MS, and GC‑MS workflows, including systems such as Waters® Alliance and Acquity.
Bonded PTFE/silicone construction provides chemical resistance and protects sample integrity. The yellow polypropylene cap enables clear visual identification and features a knurled exterior for secure handling with standard 9‑425, 12 × 32 mm autosampler vials.
Key Features & Benefits
X‑shape pre‑slit septa ✅ Larger target area, easier needle alignment
Easier penetration vs single slit ✅ Reduced injection resistance
Low coring silicone formulation ✅ Supports consistent injections
PTFE/silicone bonded septa ✅ Chemical resistance and sample protection
Yellow knurled cap ✅ Easy identification and handling
Typical Applications
HPLC and UHPLC analysis
LC‑MS and GC‑MS workflows
Waters® Alliance and Acquity systems
Methods requiring improved needle targeting
Important Notes
For 9‑425, 12 × 32 mm autosampler vials only
X‑slit design offers easier penetration but reduced resealing vs single slit
Bonded septa—no assembly required
Additional Resources