EGIS™ 4 Circuit RT Fuse Block With Cover. Protects branch circuits by accepting ATO style fuses ranging from 1 to 40 amps. Harsh environment design with stainless steel self-locking hardware and optional weather-proof labels in standard or customized options. Robust construction: designed with high temperature materials and stainless-steel self-locking hardware allow mounting anywhere on vehicle. Supports SAE circuit protection standards for thermal/short circuit events.