To use CBD vape oil cartridges, it's crucial to confirm that they're compatible with specific types of vape pens to prevent potential safety risks. Certain vape pens might not have sufficient power to heat the oil, while others may generate excessive heat, causing the oil to burn and creating hazardous byproducts. Verifying the compatibility and thread size of the cartridge and vape pen before use is vital. Most CBD vape oil cartridges use a 510-thread connection, a standard size in the vaping industry.