Painless Performance Products circuit isolating auxiliary fuse block kits. Don't go unprotected! Electrical accessories can send voltage spikes through your system, damaging everything from light bulbs to diagnostic computers. The safe way to add electrical accessories is with CirKit Boss, the first circuit isolator that provides both constant and ignition hot circuits. No more tapping into an existing wire or into a spare circuit at the fuse block. Using these add-on, relay activated fuse blocks is the safe way! Only a small activation wire from any ignition source is needed to turn on the relay that turns on the fuse block. All CirKit Boss models are made using TXL cross link polyethylene wire rated to 275 degrees. All harness wires are 48" long and factory machine terminated. CirKit Boss includes an in-line circuit breaker, relay, mounting hardware, and terminals. Easy to install. Safely adds ignition hot and constant hot circuits. Painless 70113 3-Circuit Fuse Block Painless 70103 3-Circuit Auxiliary Fuse Block Painless 70203 Weather Resistant 3-Circuit Fuse Block Painless 70213 Weather Resistant 3-Circuit Fuse Block Painless 70107 7-Circuit Fuse Block Painless 70207 7-Circuit Fuse Block Weather Resistant Painless 70117 7-Circuit Auxilliary Fuse Block Painless 70217 Weatherproof 7-Circuit Fuse Block Painless 50101 12-Circuit Fuse Block Painless 30003 18-Circuit Universal Fuse Block Painless 30001 12 Circuit Fuse Block Painless 30004 Universal Weatherproof 20 Circuit Fuse Block We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.