The BB3 - Grey or Pink The bb3 adds yet another dimension to your dynavap collection. Its full glass construction features a 10mm male connection which enables this stem to be connected to 10mm female connections. The BB3 of course loaded with 3 glass beads and 6 divots which create turbulence  as the vapour travels through the stem. This stem also has an airport which is a staple for dynavap stems. If wanting to connect to 14mm female connections the 10mm inside 14mm adapter could be a good addition. That can be found here. Dynavap Tip NOT Included Included 1 x BB3 - Grey or Pink (Please choose colour)