7 Circuits Fuse Block with 50A Circuit Breaker (70207) by Painless Performance®. The safe way to add electrical accessories to any vehicle is with a CirKit Boss. The 1st circuit isolator system available withboth constant and ignition hot circuit kits. Kits include an in-line circuit breaker, relay, relay/fuse block base with preterminated harness and mounting hardware and terminals. Protects your OEM warranty and is easy to install. Providesthree 20 Amp constant hot andfour ignition hot circuits with a maximum total amperage handling of 40 Amps. This kit includes: One weatherproof 40 Amp SPST relay. One weatherproof 50 Amp circuit breaker. Weatherproof relay base/fuse block with harness. Weatherproof crimp-on heat-shrinkable terminals. Weatherproof fuse block cover. Mounting hardware.