10-425 Screw Caps with Septa
    • 10-425 screw top cap
    • 10-425 cap size
    • 10-425 screw neck caps
    • ptfe silicone septa
    • 10-425 thread caps
    • package of caps
    10-425 screw top cap

    10-425 Screw Caps with Septa

    Suitable for: 10-425 Screw Vials
    Caps Material: polypropylene
    Septa Material: PTFE / Silicone
    Septa Size: 10*1.5mm
    Cap Features: 7mm Centre Hole or Closed Top
    Color: Black or Customized
    product description


    10-425 10mm screw neck vial cap, silicone/PTFE septa


    These polypropylene caps have excellent sealing characteristics and offer good chemical resistance including acids, alcohols, alkalis, aqueous products, cosmetics, and household oils. Polypropylene Hole Caps are known for good impact strength, cost effectiveness, and pliability. Septa sold separately.

    Polypropylene hole caps are available preassembled with separate septa or without septa. We also feature polypropylene hole closures with bonded septa to provide assurance that the septa will not slip away from the cap while injecting.


    PTFE/Silicone Septa:

    High quality, pure silicone is laminated to PTFE to give a pure, highly inert septum with excellent resealing characteristics even after repeated punctures.

    PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. Works well for applications where ease of needle penetration is important.

    Septa-silica gel has strong repetitive sealability, and it can maintain good close performance after multiple injections; PTFE is a material with better chemical conditions at present, and it can withstand strong acids and alkalis. The two materials After compounding, the bottle can be used for various laboratory purposes such as sealed sampling, chemical storage and so on. 

    PTFE/Silicone/PTFE Septa:


    A layer of PTFE is laminated to each side of high purity, medium durometer silicone to form a septum that is the most resistant to coring while maintaining good resealing characteristics. The PTFE/Silicone/PTFE septum is recommended for the most critical applications such as ultra trace analysis or where there is a longer time between injections or for internal standard methods. PTFE/Silicone/PTFE septa provide superior performance with any autosampler employing a large diameter, blunt tip needle.


    Septa Material


    Chemical Resistance


    Max Temp




    For single injection only



    Excellent resealing capabilities

    Excellent until


    Not suitable for chlorosilanes

    Multiple injections than

    moderate resistance


    Pre-slit PTFE/silicone

    Reduces coring Prevents

    vacuum from

    inside the vial

    Excellent until


    than moderate resistance

    Multiple injections




    Resistant to coring Autoclavable


    Above average resealing

    Multiple injections or applications

    with long periods between injections



    10-425 Screw Cap Detials

    Part No.



    White PTFE/Red Silicone Septa, Φ10*1.5mm


    Red PTFE/White Silicone Septa, Φ10*1.5mm


    White PTFE/Red Silicone Septa, 10-425 Black Screw PP Cap, 7mm Centre Hole


    Red PTFE/White Silicone Septa, 10-425 Black Screw PP Cap, 7mm Centre Hole

    Company Introduction

    1. Founded in 2007, Zhejiang Aijiren, Inc. specialized in chromatography consumables, such as autosampler vial for HPLC, headspace vial, GC vials, micro inserts, septa and caps, syringe filter, etc, covers more than 10000 square meters, and has clean workshop more than 2000 square meters. 100, 000 class cleaning room;  

    2. 15 years export experience, exprot to more than 70 countries, 2000+ customs around the world; 

    3. More than 10 years experience for automatic analytica technique

    4. Aijiren has own R&D Center and Quality Controll Center to keep products in high quality.

    5. All materials are produced at 100,000 grade clean room.
    6. Passed ISO9001:2015  quality management system certification, RoHS compliance can also be provided.

    How to confirm product quality before placing orders?
    After production, all articles are delivered to QC center, only qualified products can be release to the next procedure.
    Meanwhile, you are welcome to ask for samples for testing.
    How to star order or make payment?
    Proforma Invoice will be sent first after confirmation or order together with our bank infomations.
    Pay by T/T, Westren Union or Alipay.
    What is the charge standard about the Samples?
    1) For our first cooperation, free samples will be provide buyer afford the shipping cost.
    2) For our old customers, we will send free samples, even though new design samples, when have stocks.
    3) Samples delivery date is 24 to 48 hours, if have stocks. Customer design is about 3-7 days.
    Can you provide OEM service?
    Yes, we had already do OEM service for more than 4 world famous Brand in chromatography area.
    What is the MOQ?
    For vials, caps and syringe filters MOQ is 1pack(100pcs), for hand crimper/decrimper MOQ is 1pack(1pc).
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