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Crimp closure, N 20, alu., center hole,Butyl d. gray/PTFE gray,high purity,3.0mm

Similar product as 70234, however, with a higher analytical purity. These closures with molded Butyl/PTFE septa are only laminated with PTFE in the contact area with the sample. Thus the elastomeric Butyl can achieve on the vial's glass rims a very tight seal, while in comparison a completely PTFE covered septum would have a very slippery surface on the glass and could easily be twisted around. 

Additional closure features High purity molded septum, only centrically laminated with PTFE, typically called Pharma-Fix, excellent sealing, temp. resistant from -40 °C up to 120 °C
Assembling process Assembled
Autosampler compatibility Agilent, PerkinElmer, Varian
Cap color Silver
Cap hole Yes
Cap material Aluminum
Closure magnetic No
Closure type Crimp closure
Colors of septa material Dark gray/gray
Gross weight (incl. packaging) 169 g / 0.37 lbs
Hazardous material No
Nominal diameter N 20
Packaging dimensions 160 x 179 x 32 mm / 6.30 x 7.05 x 1.26 Inch
Recommended application(s) Headspace
Scope of delivery 100x N 20 ready assembled crimp closures
Septa hardness 50° shore A
Septa material Butyl/PTFE (Pharma-Fix), Butyl/PTFE (high purity)
Septa thickness 3.0 mm / 118,1 mil
Storage temperature 15–25 °C / 59–77 °F