Increase the capacity of your Horizon Falcon King tank to 6ml with this enlarged bulb glass

The Freemax Fireluke 2 bubble glass is a desirable accessory that increases e-liquid capacity to 4.5ml. The extra room reduces refill time throughout the day.

Geekvape Cerberus Extension Glass 5ml + Extension Chimney 

Bubble Glass that fits the Horizontech sakerz