The 'Peerless RDA' features an original build deck design that is made to fit large builds with an added post hole to support smaller coils. You have the option to a single or dual coil builds. There is also a special bridge design posts which makes an open liquid chamber to forgive imbalanced wicking. The extra top cap included to fit wide bore drip tips. The 9 holes side airflow system adjustable to your liking.The package includes a squonk pin for Squonk MOD.