Combo pack: 1 piece Fluke 803293 11 Amp 1000V and 1 piece Fluke 943121 440mA 1000V Fluke Digital Multimeter Replacement Fuse Nominal current: 11 A and 44/100A Maximum voltage to ground: 1000-Volt Used for fluke 1587 hybrid insulation tester and multime Used for fluke 77-3 auto ranging digital multimeter This combo pack includes 1 piece of Fluke 803293 11 Amp 1000V and 1 piece Fluke 943121 440mA (0.44A) 1000V