SXK Unkwn Midg Style RBA Bridge with 6 AirpinsBlack / SliverAir Pins: 1.2mm + 1.5mm + 2.5mm + 3mm + 3.5mm + 4.0mm (One pre-installed)Suitable for SXK Boro system / Billet / BB / Boro Tank / Vandy Vape Pulse AIO / Cthulhu AIO / Boro Mod 