Aleader's Rocket RDA sports an overall diameter of 24mm, and a height of only 20mm. With a compact form factor like this, you'll get some pretty intense flavor from this atomizer. In addition, it's primarily constructed of stainless steel and resin material. At the top, you'll also get a resin drip tip as well, so it won't get hot while chain vaping, especially when comparing it to traditional stainless steel drip tips. Also, a 510 adapter is included, allowing you to use other custom drip tips if desired.