Fuse Block Fits Fuse Type Industrial Fuse UL Class J 401 to 600 A Number of Poles 1 600V AC/DC For Fuse Size 8 in L x 2-1/2 in dia 8 in L x 2-19/32 in dia Compatible Fuse Series A4J AJT DFJ HSJ JKS JLS JTD JTD-ID LDFJ LPJ LPJ-I Series JFB Nonindicating Nonrejection Fuse Block Design Open Wire Range 4 AWG to 500 MCM Mounting Style Bolt-Down Body Material Phenolic Connector Type Box Lug Height 4.74 in Width 4.0 in Length 11.0 in Spring Reinforced Clip Yes