It is a similar experience with the A10/A19 and A7, your oil never comes in contact with any metal surfaces. The GYL-A22 is one of the mature full ceramic cartridges in the vape field because it is an innovative ceramic cartridge, that uses full ceramic material, no metal, no lead, with a medical-grade glass tank to ensure the purest taste of the original extract. With four oval shape oil intake openings, clogging will no longer exist in A22 and making A22 more perfect for thick oil.The full ceramic materials mean that A22 can pass the rigorous heavy metals testing, and achieves plenty of vapor without any burning taste. In addition, the screw-on mouth tip style makes it so special that you do not need a machine to press the mouth tip, you just need to screw the mouthpiece to the central post with your hand power, which also can seal the cartridges very well.And if you’re interested in customizing it with your logo, we can help to design and offer the most professional suggestion to make the best customization. We can also recommend and make customized packages based on your preference and budget. Check our customization page or contact us to learn more information.