CUSTOM ITEM: Caps, Screw Top, with Soft-Guard, White Silicone Rubber / Red PTFE Pre-Slit (X Shape) Septa, fitted in "knurled", polypropylene, Red Caps. For use with 9-425mm thread, 12x32mm autosampler vials. Soft-Guard Brand. BULK PRICING.
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‑3XR Soft‑Guard™ Screw Caps use a bonded X‑slit silicone/PTFE septum that allows easier penetration compared to traditional single‑slit designs, while maintaining acceptable resealing for many applications. The Soft‑Guard™ formulation reduces coring and supports more consistent injection performance in HPLC, GC, LC‑MS, and GC‑MS workflows, including systems such as Waters® Alliance and Acquity.
Bonded PTFE/silicone construction provides chemical resistance and helps protect sample integrity. The red polypropylene cap features a knurled exterior for secure grip, easy identification, and consistent sealing 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
Red knurled cap ✅ Easy identification and secure 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
Intended for specialized applications
This and other custom items are Custom Ordered and require quotation
Additional Resources
Custom Item Pricing Information