The Gas Mods GR1 22MM BF RDA is a compact bottom feed rebuildable dripping atomizer. It features a single coil build deck, adjustable replaceable airflow system and squonk ready technology. The GR1 includes airflow accessories such as two different air hole size, one of them being 2mm x 2mm on each side and the other being 2mm x 5mm on each side. The GR1 air holes produce its best flavor production at 45 degrees. The Gas Mods GR1 is truly on of its kind with its single coil compact structure and replaceable adjustable airflow system.