Silicone Rubber Stopper Fits 4 - 5 mm NMR Tube - 50 Pack

Silicone Rubber Stoppers for NMR Sample Tubes

• Black
• Will fit our thin wall tubes having an O.D. of 4mm to 5mm. (3.2mm to 4.2mm I.D.)
• Packed in Lots of 50
  
  These stoppers can provide a solution for those difficult situations when a standard tube cap cannot be used, as, for instance, when space is a limiting factor.