Crimp seals ND11 are made of aluminium. They have a 5.5 mm hole. They are supplied with fitted septa. These septa are temperature-resistant from -40 °C to 120 °C and ideal for multiple injections thanks to their excellent resealability properties. Septa made of natural rubber / butyl / TEF combine the good physical properties of natural rubber (resealability) and the good chemical properties of butyl (analytical cleanliness). Natural rubber red-orange / TEF transparent, gold, magnetic cap, 60°shore A. Thickness: 1,3 mm.