Boulder is a veteran vape manufacturer (we're already the #1 brand in China) and we make all our products ourselves, from the ground up. Including all our vape parts and accessories. Thanks to our deep background in electronics manufacturing, you can count on our accessories for precision and quality, time and again. Because of our long industry experience, we enjoy access to the best source materials – the "A quality" -- from our supply chain. That's why our batteries are so good and why our individual components perform better and longer. With Boulder you can always count on premium quality.