The UB Replacement pods come in two variants, UB PRO to be used with Ultra Boost PRO Coils and the UB which are to be used with the Ultra Boost Coils (Not Included) The UB Pod tank was first seen on the Grus 100 Kit and features a push fit bottom coil design and a side filling system, both pods have a 810 driptip however the UB Pro Pod features a slightly bigger diameter to account for a less restrictive vape when using the Pro Coils. *no 510 section included only the pod section.