Aluminium crimp caps, ND8 with central hole, 4 mm and septum. pk of 1000

Crimp Caps ND8 can be purchased with a variety of septa materials. Furthermore, push-on snap caps for crimp neck vials ND8 are available.
 
High performance caps/septa
Fits with standard ND8 Crimp neck vials
 
Crimp Caps ND8 can be purchased with a variety of septa materials. Crimp caps mostly available with assembled stopper or septa are engineered to prevent sample contamination while providing consistent, secure seals.