KPR103 Krypton Flashlight Replacement Bulb - Description - 3.60 Volt - 0.75 Amp - B3-1/2 Krypton Single Contact Miniature Flanged (P13.5S) Base - C-2R Filament Design - 2.70 MSCP - 20 Average Rated Hours - 1.25" Maximum Overall Length - 0.45" Maximum Overall Diameter. KPR103 Krypton Flashlight Replacement Bulb