WirthCo Battery Doctor In-Line ATO/ATC Fuse Holder with Cover is designed with a 30 ampere in-line fuse holder for blade fuses. It features a water resistant cap and 12-gauge wire. The loop length is 5.5 inches. A 30 ampere fuse is included. For over 30 years, WirthCo has been a prime manufacturer of practical products for making life easier and safer. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm