TURBO COMPRESSOR AND EXTENDED TANK SYSTEM - The Model 840 is designed for use with the CANNON BALL EXPRESS train horn or any high-pressure horns that require an onboard air system. This product is specifically designed to power the following Wolo horn models: 837, 838, 839.
CANNONBALL EXPRESS EV 24 - Powerful Train Horn. Three (3) Trumpet Metal Chrome Plated with 24-volt Electric Solenoid Valve. Requires On-board Air System.
CANNON BALL EXPRESS EV12 -Powerful Train Horn Three (3) Trumpet Metal Chrome Plated with 12-volt Electric Solenoid Valve. Requires an On-Board Air System. UPC 0 80217 00837 2