Sig S RDA Black from Sigelei is a new rebuildable atomizer that has a superior build and quality at an affordable price. The Sig S Atty Black has great airflow, and a solid 22mm deck that sits flush on most atomizers. The Sig S Atty Black is a 3 post design, with one solid positive post, and 2 negative posts with plenty of room for building. The Sig S RDA Atty Black from Sigelei is a great atomizer for beginners to learn how to rebuild their coils. Pick up the Sig S Atty Black and start learning how to rebuild your coils.