Bussmann MDL-1/2 1/2 Amp Time-Delay Glass Tube Fuse, 250V UL Listed 5-In Tin Time-delay, glass tube Optional axial leads available 1/4-Inch x 1-1/4-Inch (6.4 x 31.7mm) physical size Glass tube, nickel-plated brass end cap construction UL Listed product meets standard 248-14