Designed for squonker mods, the GAS MODS G.R.1 BF RDA will be your best friend! It is a cute rebuidable tank with a 22mm diameter. The kit comes with two pairs of elements for airflow adjustment. Just install them and you will enjoy optimal flavor with huge clouds! The GAS MODS also provides replacement top cap and drip tips with various colors (sold separately) to make your G.R.1 RDA colorful and attractive! Just get G.R.1 RDA for your squonker MODs!