This Prince V12-RBA Deck kit comes with everything you need for installing your own coils and comes pre-installed with patented Fused Clapton Coils. The deck has large wicking holes to ensure you never get a dry hit. Included within this kit is a 5ml Extension glass, as the original glass supplied with the Prince EU Tank is not large enough to hold the RBA deck You can also buy from Ubervape the 8ml Fatboy Bubble Glass if you want to hold more juice.The Prince RBA is a great deck to build on as there is plenty of room