Sourced from Velx (the parent company of GeekVape) these are the best 510 cartridges I have been able to test.
After testing a large variety of different Vape Cartridges these are the ones I decided performed the best.
Easy to fill and refill, no clogging or leaking, and great airflow.
Product Features: Ceramic, Stainless Steel and Glass, NO PLASTIC
Tank Volume: 1.0ml
Tank Material: Glass
Mouthpiece shape and Material: flat & ceramic
Mouthpiece color: Black
Air-Flow: From Bottom
Drip Hole Size: 2.00mm