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Custom Inorganic Standards

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Closures

Closures​

Guaranteed Compatibility with Agilent, Varian, Shimadzu, PerkinElmer, and More.

Extra-Long-Life
Multipliers & Filaments

Manufactured
in the USA

Increase Instrument
Uptime

Industry-Leading
Linearity

Used by OEMs in
Premium Instruments

Late Order
Cutoff Time
2026 Variant Price List
Sort By: Featured

Closures

[4250-5396F09] 9mm R.A.M.™ Smooth Cap, Black, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Smooth Cap, Black, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-5396F09
$ 333.00 333.0 USD
[4250-532009RB] 9mm Solid Top R.A.M.™, Ribbed Royal Blue Polypropylene Cap Unlined, 1000/pk
9mm Solid Top R.A.M.™, Ribbed Royal Blue Polypropylene Cap Unlined, 1000/pk
Item number 4250-532009RB
$ 53.00 53.0 USD
[4250-5396F09PK] 9mm R.A.M.™ Smooth Cap, Pink, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Smooth Cap, Pink, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-5396F09PK
$ 333.00 333.0 USD
[4250-5397UL09FRB] 9mm R.A.M.™ Ribbed Cap, Royal Blue, Clear PTFE/Blue Silicone w/Slit, Ultra Low Bleed - Mass Spec, 1000/pk
9mm R.A.M.™ Ribbed Cap, Royal Blue, Clear PTFE/Blue Silicone w/Slit, Ultra Low Bleed - Mass Spec, 1000/pk
Item number 4250-5397UL09FRB
$ 370.00 370.0 USD
[4250-539609FY] 9mm R.A.M.™ Ribbed Cap, Yellow, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Yellow, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-539609FY
$ 333.00 333.0 USD
[4250-539609FRB] 9mm R.A.M.™ Ribbed Cap, Royal Blue, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Royal Blue, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-539609FRB
$ 333.00 333.0 USD
[4250-539709FR] 9mm R.A.M.™ Ribbed Cap, Red, PTFE/Silicone with Slit Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Red, PTFE/Silicone with Slit Lined, 1000/pk
Item number 4250-539709FR
$ 356.00 356.0 USD
[4250-5397109FG] 9mm R.A.M.™ Ribbed Cap, Green, Bonded PTFE/Silicone with Slit Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Green, Bonded PTFE/Silicone with Slit Lined, 1000/pk
Item number 4250-5397109FG
$ 370.00 370.0 USD
[4250-539609F] 9mm R.A.M.™ Ribbed Cap, Black, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Black, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-539609F
$ 374.00 374.0 USD
[4250-539509FY] 9mm R.A.M.™ Ribbed Cap, Yellow, PTFE/Silicone Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Yellow, PTFE/Silicone Lined, 1000/pk
Item number 4250-539509FY
$ 210.00 210.0 USD
[4250-5395109FPK] 9mm R.A.M.™ Ribbed Cap, Pink, Bonded PTFE/Silicone Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Pink, Bonded PTFE/Silicone Lined, 1000/pk
Item number 4250-5395109FPK
$ 327.00 327.0 USD
[4250-5310F09G] 9mm R.A.M.™ Green, Smooth Polypropylene Open Hole Cap, 1000/pk
9mm R.A.M.™ Green, Smooth Polypropylene Open Hole Cap, 1000/pk
Item number 4250-5310F09G
$ 54.00 54.0 USD
[4250-5371F09RB] 9mm R.A.M.™ Smooth Cap, Royal Blue, PTFE/Silicone Lined with Y Cut, 1000/pk
9mm R.A.M.™ Smooth Cap, Royal Blue, PTFE/Silicone Lined with Y Cut, 1000/pk
Item number 4250-5371F09RB
$ 313.00 313.0 USD
[4250-5396F09G] 9mm R.A.M.™ Smooth Cap, Green, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Smooth Cap, Green, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-5396F09G
$ 333.00 333.0 USD
[4250-539609FO] 9mm R.A.M.™ Ribbed Cap, Orange, PTFE/Silicone/PTFE Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Orange, PTFE/Silicone/PTFE Lined, 1000/pk
Item number 4250-539609FO
$ 333.00 333.0 USD
[4250-5310F09] 9mm R.A.M.™ Black, Smooth Polypropylene Open Hole Cap, 1000/pk
9mm R.A.M.™ Black, Smooth Polypropylene Open Hole Cap, 1000/pk
Item number 4250-5310F09
$ 54.00 54.0 USD
[4250-5395M09FN] 9mm R.A.M.™ Magnetic Cap, PTFE/Silicone Lined, 100/pk
9mm R.A.M.™ Magnetic Cap, PTFE/Silicone Lined, 100/pk
Item number 4250-5395M09FN
$ 67.00 67.0 USD
[4250-5310F09N] 9mm R.A.M.™ Natural, Smooth Polypropylene Open Hole Cap, 1000/pk
9mm R.A.M.™ Natural, Smooth Polypropylene Open Hole Cap, 1000/pk
Item number 4250-5310F09N
$ 54.00 54.0 USD
[4250-5310F09R] 9mm R.A.M.™ Red, Smooth Polypropylene Open Hole Cap, 1000/pk
9mm R.A.M.™ Red, Smooth Polypropylene Open Hole Cap, 1000/pk
Item number 4250-5310F09R
$ 54.00 54.0 USD
[4250-5395109F] 9mm R.A.M.™ Ribbed Cap, Black, Bonded PTFE/Silicone Lined, 1000/pk
9mm R.A.M.™ Ribbed Cap, Black, Bonded PTFE/Silicone Lined, 1000/pk
Item number 4250-5395109F
$ 327.00 327.0 USD