Screw Terminal Blade Fuse Block - 12 circuits with negative bus and cover. Easy to open insulating cover that provides access to fuses and satisfies ABYC/ USCG requirements. LED Warning Indicator - Red LED warning light will light up immediately when the corresponding fuse is blown. It is both safe and easy for you to check and replace the blown fuse. Safe Material - Made of environment friendly PBT material, this fuse holder meets all the standards of an ideal fuse box. It is mechanically strong, insulated, heat resistant and flame resistant. There will hardly cause any issue like produce fracture, deformation, combustion or short circuit phenomenon. Safe & Secure Design- Easy to install, can be secured via 4 pre-molded holes; Marine-grade stainless steel input & output screws have high performance of anti-corrosion. MULTI-FUNCTION - Come with multi-function stickers for DIY your specific need, convenient for examination and repair, easy to troubleshoot in outdoor; widely used in vehicle, car, marine, bus, ship, tanker, subway, etc. 12-Way Package includes:1 x 12 circuits with negative bus Fuse Block, 6 x, 5A orange fuse pieces, 6 x 10A red fuse pieces, 6 x 15A blue fuse pieces, 6 x 20A yellow fuse pieces, 2 x Stickers, 4 x Screws.