The Zenith Pro
User replaceable glass, no riser for the mouthpiece like on the original. Larger 5.5ml capacity and  two new coils with improved airflow for RDL vaping.

Specs: 

5.5ml Tank Size
1.2ohm (10-14W), 1.0ohm (20-25W)
Zenith Series Coils
Bottom Airflow
Top Filling 

1x Zenith Pro Tank (1.2Ω)
1x Extra Coil (1.0Ω) 
1x Extra Drip Tip
1x Extra Glass Tube
1x Spare O-Ring Set
1x Decorative Ring