new accessories

NMR septum caps

Our new NMR caps offer an increased denseness to solvents, such as acetone, water, chloroform, and DSMO, compared with standard caps. The septum, which is an additional seal on the rim, further increases the tightness. Nevertheless, the caps can be removed from the tube easily. When extracting and filling the samples, the septum is suitable for puncturing the cap with regular disposable cannulas. The caps will only loose minimal tightness, which ensures low evaporation when emptying and filling the tubes.


  • Cap

• PP
• PE

  • Septum

• White silicone/PTFE blue 55° shore A 0,9 mm (slotted)
• Natural rubber red/TEF tranparent 60° shore A 1,3 mm (without slot)

Process of Production

  • Injection molding/assembly


  • Standard (5 mm)


  • With sealing septa
  • With slot
  • Without slot
  • Dyadic


  • Round (Standard)


  • Increased tightness
  • Punctureable
  • Low evaporation rate
  • Solid fit
  • Exchangeable seal


  • Analytics
  • Nuclear magnetic resonance imaging (NMR)
  • Glass tube with side-opening
  • Glass fibers with sphere formed end
  • NMR Tubes with thread for low vacuum applications
  • Mark tubes with special inner surface
  • Mini test tubes with extended flange
  • New preform for redrawing of capillaries
  • Test tubes with sagging at the bottom
  • Cloning cylinders with numbering
  • Large-volume theta cross-section capillaries
  • High tightness with new standard cap
  • Complex component made of quartz glass
  • Dropper pipettes in many sizes and designs
  • Packing glasses protected from light
  • Ampoules with built-in test leckage
  • Thick-walled sample vessels
  • Measuring ampoules with conical bottom
  • Special glass capillaries for measurements
  • Glass capillaries with constriction
  • Finely scaled glass cannulas
  • CNC processing of glass plates
  • New 5 mm NMR standard caps
  • Glass crucible for thermal analyses
  • Glass capillaries with graduation
  • Square capillary with 9 internal channels
  • 9-fold capillary made of borosilicate glass 3.3
  • Our tool for cutting glass capillaries
  • Diamond wire for cutting capillaries
  • Sight glasses (laser structured)
  • Very thick-walled capillaries
  • Polyimide coated filling needles
  • Ampoules with small volume
  • NMR tubes colored (UV protection)
  • NMR septum caps (increased denseness)
  • NMR tubes (barcode & constriction)
  • Mark tubes with perforated bottom
  • Test tubes with hole e.g. as vent
  • Test tubes with grooved rim
  • Oval capillaires (thin-walled)
  • Triangular capillaries (thin-walled)
  • Twisted capillaries by hot forming
  • Multi-channel capillaries (circular array)
  • Special light pipe made of glass
  • Luggin-capillary for measurements
  • Test mandrels (different materials)
  • Carpoules with special-rolled rim
  • Glass capillary for the stimulation
  • XRD-capillary with Luer-connector
  • Glass nozzle with seal-and retaining ring
  • Glass capillary with side-mounted connectors
  • Easily destructible glass ampoules
  • Glass rods with surface patterning
  • Long-conical focusing nozzles
  • Surface patterning of glass substrates
  • Laser sublimation-drilling in flat capillaries
  • Thin needles up to 180 ° flexible
  • Glass needles with curved tip
  • Polished to precision glass rings
  • Glass rods with partially-frosted surface
  • Sealing glass with high thermal expansion