Milton (838) 50' Deluxe Driveway Signal Hose QUALITY: 3/8" ID (inside diameter) rubber signal hose, 50-ft. UV and oil-resistant. Made in USA. 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!