The TFV8 Baby Beast RBA will change your feelings about the Baby Beast Tank! The RBA is a replacement coil head that you can rebuild on and it will knock your socks off. With a two-post design and a velocity style deck, you can truly put some great builds in this little guy. SMOK also made sure to create massive juice ports and airflow holes so you can always achieve amazing flavor and vapor production that you have come to know and love. In the box, you will see an “extra” piece of glass - this glass is an expansion piece of glass needed to accommodate the RBA size. You will need to replace the glass on your Baby Beast with the expansion glass, this is due to the Baby Beasy RBA coil being just a bit taller than the standard Baby Beast coils. Also, as a little bonus, they also pre-installed fused Clapton coils that read to 0.35 ohms, a carrying case, extension glass and as always, extra bits and parts that you may need in the future.