LITTLELFUSE PICO Fuses (5 pieces) Fast Blow (Quick Blow/Fast Acting) 4 Amp (4A) 125v/250v, AXIAL, 1/16" Dia x 5/16" L, PICO II (263 series) Set of 5 pieces Fast Blow (Quick Blow/Fast Acting) Axial Leaded Pico Fuses 4 Amp (4A) 263 Series 125v/250v 1/16" Dia x 5/16" L (3.94mm x 7.11mm)