Zob Princess Zobello Dab Rig This is the perfect concentrate piece from Zob Glass! It's approx. 10 inches tall and is 5mm thick. The pipe features the Zobello perc for excellent percolation. This piece is stemless and is ready for a 14mm nail. A 14mm dome comes with this beaker. Zob goes to great lengths to make each piece one of a kind, so the label you receive most likely won't be the one shown.