The UWELL Crown 4 IV Replacement Bulb Glass is a durable quartz glass manufactured for the 28mm diameter Crown 4 IV Sub-Ohm Tank, featuring a pure quartz construction, thermal shock resistance, and is designed to hold up to 6.0mL of eJuice.

Specs

• 6.0mL Bubble Glass
• Quartz Glass Construction
• Thermal Shock Resistant & Durable