Features and Benefits: DESIGNED: For driveway signals in home garages auto shops service stations bank/restaurant drive-thru windows and more. DESIGNED: For driveway signals in home garages auto shops service stations bank/restaurant drive-thru windows and more. TO COMPLETE SYSTEM: Pair drive signal hose with a bell/chime and air switch (if applicable). LONGER DRIVEWAY SIGNAL HOSE REEL OPTION: Milton #839 (3/8 ID 300-ft.). DEPENDABLE: Milton Industries has been producing driveway signals for over 40 years! Milton (838) 50 Deluxe Driveway Signal Hose Milton Industries has been producing driveway signals for over 40 years. Driveway signal bells and chimes would not be complete without a driveway signal hose. This 50 foot deluxe rubber driveway signal hose is both UV and oil resistant. Has a 3/8 hose ID. Designed for use at service stations bank/restaurant drive up windows home garages and/or anywhere seeking an attendant to be alerted.