Marathon Special Products 812 / 912 GP series single row terminal blocks specifications A Kulka® Brand, 30 amps, 600 Volts AC/DC, Class B/C, 912 series (riveted construction) 300 Volts AC/DC, Class C, Base, phenolic, 150°C (UL RTI), JJ (GDI-30F) material available, Screws, steel, #8-32 phil-slot, Terminals, plated brass, Open back design (Insulator strip required for voltage rating), 1-18 poles at 9/16" centers, Accepts lugs w/max width of .41" & Bare wire range #12-#14 AWG. The standards include UL recognized file no. XCFR2.E47811, CSA certified file no. LR19766, CE Compliant (IEC 60947-7-1) & RoHS compliant.