Headspace screw neck vials and magnetic screw closures N 18
Headspace screw neck vials N 18 
More convenient, consistent, and safer sealing process compared to crimping (better reproducibility)No risk of inaccurate or inconsistent crimping results
Magnetic screw closures N 18 Thinner septum (1.5 instead of 3 mm), thus safe penetration of the needle and less fragmentation (especially important for SPME applications)Flat surface for the magnet; thus the filled vial cannot drop from the magnet
(In case of over-crimped vials, this can happen due to the convexity of the cap.) For vial containers click here.
Septa are shown for illustration purposes only, images upside down.
Packs of 100 closures eachCap description Septum description Hardness Thickness REF Illustration N 18 magnetic
screw cap, silver
center holeSilicone blue transparent /
PTFE white45° shore A 1.5 mm 702827
N 18 magnetic
screw cap, silver
center holeSilicone white / PTFE blue 45° shore A 1.5 mm 702055
N 18 magnetic
screw cap, silver
center holeSilicone white / PTFE blue,
slit45° shore A 1.5 mm 702136
N 18 magnetic
screw cap, silver
center holeRed Rubber / TEF colorless 45° shore A 1.5 mm 702072
– Silicone blue transparent /
PTFE white45° shore A 1.5 mm 702981 –
– Silicone white / PTFE blue 45° shore A 1.5 mm 702110 –
