- GPI Thread Finish: 18-400

- Shell Material: Polypropylene

- Liner Material: PTFE (Teflon)

- Cap Color: Blue


Magnakoys® 18-400 Teflon (PTFE) Lined Continuous Thread Closure.

Black Caps Fit your 4 Dram vials and 1/2 Ounce Boston Round bottles with the perfect closure.

*See our images for explanation on how to fit caps to vials.

FAST SHIPPING - Mon. - Fri. orders placed before 3:00 PM Eastern Time Zone: ship the same day.
Sat. orders placed before 12:00 PM Eastern Time Zone: ship the same day.