A convenient means of adding fused circuits to power accessories or auxiliary loads. Each pole has its own 1/4 male quick-connect isolated terminals (power is not provided by a common bus). These blocks feature a back plate for additional safety and electrical isolation. The clear cover has an O-ring seal to help keep out contaminants and makes it easy to inspect fuses (fuses not included). 15A per circuit. Operating environment: -40C to 105C (-40F to 221F), 95% RH non-condensing. Uses two 5.5mm mounting holes for M5 (#10) screws.