Bussmann Fuse Block, Modular, Series: RM Series, 250 V, 35 to 60 A, 3 Pole, Class: R, Fuse Holder Code: K, Box Lug/Slot Screw, 14 to 2 AWG Cu, 8 to 2 AWG Al Wire, DIN Rail/Panel Mount, 3 in Fuse Length, 0.81 in Fuse Dia, -40 to 120 deg C, For Use With: Low-Peak LPN Series Time Delay, Limitron KTN-R Series Fast Acting, Fusetron FRN Series Time Delay Ferrule Fuse, Thermoplastic, 4.2 in L x 4 in W x 2.3 in H