Ferraz Shamwut/Mersen ATM-1, 1Amp (1A) 600V Fast Blow Midget Cartridge Fuse Dimension: 10.3mm x 38.1mm Cartridge 1Amp (1A) 600V Fast Blow Midget Fuse This Ferraz Shamwut/Mersen ATM-1 (ATM1) could be used to substitute for Bussmman KLM-1 and Littelfuse KLKD001