STOCKS AG Fan Jet PRO Control Box – Fixed Disc Speed Control. STOCKS FAN JET PRO Control Box – Fixed Disc Speed Control. In-cab fixed disc-speed control console unit with instant, positive feed shut-off, start-up and disc control is standard on the Fan Jet Pro. Left hand toggle switch – Main power and disc on/off. Right-Hand Toggle switch – Hopper feed shutter on/off. Please message us if this listing is showing less qty than you require. Also available to collect in person from our stores subject to availability. You can visit our premises where you can see our vast range of new and used machinery and parts. Opening Times: Monday-Friday 8.00am-4.45pm. Saturday & Sunday: Closed. Agri-Linc, Randalls Farm, Scottlethorpe Road, Edenham, Bourne, Lincs, PE10 0LN. Tel: 01778 591 225. This product is listed in multiple stores and is offered on a first-come-first-served basis.