Hornblaster TA-508H Horn-Air Black 5 Gallon 8 Port Air Tank. There are 4 ports on the side, 1 on each end, 1 on top, and 1 on the bottom respectively.
5 Gallon US Made Steel Air Tank - 8 NPT Ports
HornBlasters USA Made 12 Gallon 8 Port Steel Air Tank : Automotive
HornBlasters 5 Gallon 8 Port Black Steel Air Tank : : Everything Else
HornBlasters USA Made 5 Gallon 8 Port Black Steel Air Tank : Tools & Home Improvement
HornBlasters USA Made 5 Gallon 8 Port Black Steel Air Tank : Tools & Home Improvement
US Made 20 Gallon Air Tank - 7 Ports
Viking Horns V1003AT 1.5 Gallon Air Tank for Air Horn System : : Car & Motorbike
Vixen Horns 5 Gallon (18 Liter) Train/Air Horn Tank with 200 PSI Compressor Onboard System/Kit 12V VXO8350 : Automotive
HornBlasters Train Horns & Air Horns At Dales Super Store
VIAIR Dual 380C Pewter Constant Duty Air Compressors with 5 Gallon 8 Port Tank