JRCC001 No oil waste structure Standard 510 thread is a high-quality and durable product manufactured by our factory. As a factory, we pride ourselves in producing only the best products for our customers. This innovative structure has been designed to ensure that no oil is wasted during use. Its 510 thread makes it compatible with most vaporizer pens and mods in the market. Our product is made from top-grade materials that guarantee its longevity. You can trust that our product will give you a smooth and enjoyable vaping experience, without any oil wastage. Order yours today and experience the difference.