Blue Sea 12 Circuit ST Blade Split Bus Fuse Block The Blue Sea ST Blade Split Bus Fuse Block is a great option when a mix of switched and 24-hour circuits are desired in the same block. This split bus block provides two isolated groups of six ATOATC circuits. Use this fuse block with either two isolated batteries or with a single battery providing a mix of 24 hour and switched circuits. Fuse box includes a clear insulating cover with label recesses and storage for two fuses. Features Provides tw