Shenzhen NICKVI is a factory that majors in the vape cartridge industry for over 4 years, with a 15000 square feet factory. We pride ourselves on the following: The lowest documented failure rate of cartridge in the industry (less than 0.3%). Many US-based customers are happy to provide a reference. Ability to offer savings between 10% to 30% of your current pricing. Superior customer service, all office staff speaks English. On-time delivery. Lead-free components. On the staff engineering department. Custom orders are never a problem. We handle everything including shipping, customs, tariff payments.