NEW 10 pcs type 1850 Incandescent lamps (Ten bulbs bulk packaged). Specifications: 5VDC 0.09A (0.45W) T3-1/4 glass bulb with BA9 bayonet base. Maximum length of 1.22in, 13/32″ (10mm) diameter. Commonly used as meter lamp indicator in select models of amateur radios such as Drake L4-B. Visit our eBay store for other radio accessories.